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• How to remove window applet from Gnome3?

  - by Filip Nowak

  I installed today window applet for Gnome3 from this webupd8 post. The effect of the installation shown in the picture. I tried apt-get remove --purge and nothing happens. How do I remove this window applet? http://i.stack.imgur.com/D1s9b.jpg When i try metacity --replace &unity [1] 3171 Checking if settings need to be migrated ...no Checking if internal files need to be migrated ...no Backend : gconf Integration : true Profile : default Adding plugins Skipping upgrade com.canonical.unity.unity.01.upgrade Skipping upgrade com.canonical.unity.unity.02.upgrade Initializing core options...done Initializing bailer options...done Initializing detection options...done Initializing composite options...done Initializing opengl options...done Initializing decor options...done Initializing move options...done Initializing vpswitch options...done Initializing gnomecompat options...done Initializing grid options...done Initializing mousepoll options...done Initializing place options...done Initializing resize options...done Initializing animation options...done Initializing wall options...done Initializing session options...done Initializing workarounds options...done Initializing wobbly options...done compiz (expo) - Warn: failed to bind image to texture Initializing expo options...done Initializing ezoom options...done Initializing staticswitcher options...done Initializing fade options...done Initializing scale options...done Screen geometry changed: 0x0x1920x1080 Initializing unityshell options...done DEBUG 2012-02-19 21:22:40 glib <unknown>:0 Setting to primary screen rect: x=0 y=0 w=1920 h=1080 WARN 2012-02-19 21:22:40 unity.favorites FavoriteStoreGSettings.cpp:138 Unable to load GDesktopAppInfo for 'bluefish.desktop' WARN 2012-02-19 21:22:40 unity.favorites FavoriteStoreGSettings.cpp:138 Unable to load GDesktopAppInfo for 'filezilla.desktop' WARN 2012-02-19 21:22:40 unity.favorites FavoriteStoreGSettings.cpp:138 Unable to load GDesktopAppInfo for 'gimp.desktop' WARN 2012-02-19 21:22:40 glib.glib-gobject <unknown>:0 invalid cast from `BamfWindow' to `BamfApplication' WARN 2012-02-19 21:22:40 glib.glib-gobject <unknown>:0 invalid cast from `BamfWindow' to `BamfApplication' WARN 2012-02-19 21:22:40 glib.glib-gobject <unknown>:0 invalid cast from `BamfWindow' to `BamfApplication' WARN 2012-02-19 21:22:40 glib.glib-gobject <unknown>:0 invalid cast from `BamfWindow' to `BamfApplication' WARN 2012-02-19 21:22:40 glib.glib-gobject <unknown>:0 invalid cast from `BamfWindow' to `BamfApplication' WARN 2012-02-19 21:22:40 glib.glib-gobject <unknown>:0 invalid cast from `BamfWindow' to `BamfApplication' WARN 2012-02-19 21:22:40 glib.glib-gobject <unknown>:0 invalid cast from `BamfWindow' to `BamfApplication' WARN 2012-02-19 21:22:40 glib.glib-gobject <unknown>:0 invalid cast from `BamfWindow' to `BamfApplication' WARN 2012-02-19 21:22:40 glib.glib-gobject <unknown>:0 invalid cast from `BamfWindow' to `BamfApplication' WARN 2012-02-19 21:22:40 glib.glib-gobject <unknown>:0 invalid cast from `BamfWindow' to `BamfApplication' WARN 2012-02-19 21:22:40 glib.glib-gobject <unknown>:0 invalid cast from `BamfWindow' to `BamfApplication' WARN 2012-02-19 21:22:40 glib.glib-gobject <unknown>:0 invalid cast from `BamfWindow' to `BamfApplication' WARN 2012-02-19 21:22:40 glib.glib-gobject <unknown>:0 invalid cast from `BamfWindow' to `BamfApplication' WARN 2012-02-19 21:22:40 glib.glib-gobject <unknown>:0 invalid cast from `BamfWindow' to `BamfApplication' WARN 2012-02-19 21:22:40 glib.glib-gobject <unknown>:0 invalid cast from `BamfWindow' to `BamfApplication' WARN 2012-02-19 21:22:40 glib.glib-gobject <unknown>:0 invalid cast from `BamfWindow' to `BamfApplication' WARN 2012-02-19 21:22:40 glib.glib-gobject <unknown>:0 invalid cast from `BamfWindow' to `BamfApplication' WARN 2012-02-19 21:22:40 glib.glib-gobject <unknown>:0 invalid cast from `BamfWindow' to `BamfApplication' WARN 2012-02-19 21:22:40 glib.glib-gobject <unknown>:0 invalid cast from `BamfWindow' to `BamfApplication' WARN 2012-02-19 21:22:40 glib.glib-gobject <unknown>:0 invalid cast from `BamfWindow' to `BamfApplication' WARN 2012-02-19 21:22:40 glib.glib-gobject <unknown>:0 invalid cast from `BamfWindow' to `BamfApplication' Setting Update "texture_filter" Setting Update "sync_to_vblank" Setting Update "fullscreen_visual_bell" Setting Update "panel_opacity" Setting Update "launcher_opacity" Setting Update "icon_size" WARN 2012-02-19 21:23:32 unity.glib.dbusproxy GLibDBusProxy.cpp:255 Cannot call method InfoRequest proxy /com/canonical/unity/lens/applications does not exist WARN 2012-02-19 21:23:32 unity.glib.dbusproxy GLibDBusProxy.cpp:255 Cannot call method SetActive proxy /com/canonical/unity/lens/applications does not exist WARN 2012-02-19 21:23:32 unity.glib.dbusproxy GLibDBusProxy.cpp:255 Cannot call method InfoRequest proxy /com/canonical/unity/lens/commands does not exist WARN 2012-02-19 21:23:32 unity.glib.dbusproxy GLibDBusProxy.cpp:255 Cannot call method SetActive proxy /com/canonical/unity/lens/commands does not exist WARN 2012-02-19 21:23:32 unity.glib.dbusproxy GLibDBusProxy.cpp:255 Cannot call method InfoRequest proxy /com/canonical/unity/lens/files does not exist WARN 2012-02-19 21:23:32 unity.glib.dbusproxy GLibDBusProxy.cpp:255 Cannot call method SetActive proxy /com/canonical/unity/lens/files does not exist WARN 2012-02-19 21:23:32 unity.glib.dbusproxy GLibDBusProxy.cpp:255 Cannot call method InfoRequest proxy /com/canonical/unity/lens/music does not exist WARN 2012-02-19 21:23:32 unity.glib.dbusproxy GLibDBusProxy.cpp:255 Cannot call method SetActive proxy /com/canonical/unity/lens/music does not exist WARN 2012-02-19 21:23:33 unity.iconloader IconLoader.cpp:509 Unable to load contents of file:///usr/share/icons/unity-icon-theme/places/svg/category-available.svg: Blad podczas otwierania pliku: Nie ma takiego pliku ani katalogu WARN 2012-02-19 21:23:33 unity.iconloader IconLoader.cpp:509 Unable to load contents of file:///usr/share/icons/unity-icon-theme/places/svg/category-installed.svg: Blad podczas otwierania pliku: Nie ma takiego pliku ani katalogu

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• Java FAQ: Tudo o que você precisa saber

  - by Bruno.Borges

  Com frequência recebo e-mails de clientes com dúvidas sobre "quando sairá a próxima versão do Java?", ou então "quando vai expirar o Java?" ou ainda "quais as mudanças da próxima versão?". Por isso resolvi escrever aqui um FAQ, respondendo estas dúvidas e muitas outras. Este post estará sempre atualizado, então se você possui alguma dúvida, envie para mim no Twitter @brunoborges. Qual a diferença entre o Oracle JDK e o OpenJDK?O projeto OpenJDK funciona como a implementação de referência Open Source do Java Standard Edition. Empresas como a Oracle, IBM, e Azul Systems suportam e investem no projeto OpenJDK para continuar evoluindo a plataforma Java. O Oracle JDK é baseado no OpenJDK, mas traz outras ferramentas como o Mission Control, e a máquina virtual traz algumas features avançadas como por exemplo o Flight Recorder. Até a versão 6, a Oracle oferecia duas máquinas virtuais: JRockit (BEA) e HotSpot (Sun). A partir da versão 7 a Oracle unificou as máquinas virtuais, e levou as features avançadas do JRockit para dentro da VM HotSpot. Leia também o OpenJDK FAQ. Onde posso obter binários beta Early Access do JDK 7, JDK 8, JDK 9 para testar?A partir do projeto OpenJDK, existe um projeto específico para cada versão do Java. Nestes projetos você pode encontrar binários beta Early Access, além do código-fonte. JDK 6 - http://jdk6.java.net/ JDK 7 - http://jdk7.java.net/ JDK 8 - http://jdk8.java.net/ JDK 9 - http://jdk9.java.net/ Quando acaba o suporte do Oracle Java SE 6, 7, 8? Somente produtos e versões com release oficial são suportados pela Oracle (exemplo: não há suporte para binários beta do JDK 7, JDK 8, ou JDK 9). Existem duas categorias de datas que o usuriário do Java deve estar ciente:  EOPU - End of Public UpdatesMomento em que a Oracle não mais disponibiliza publicamente atualizações Oracle SupportPolítica de suporte da Oracle para produtos, incluindo o Oracle Java SE O Oracle Java SE é um produto e portando os períodos de suporte são regidos pelo Oracle Lifetime Support Policy. Consulte este documento para datas atualizadas e específicas para cada versão do Java. O Oracle Java SE 6 já atingiu EOPU (End of Public Updates) e agora é mantido e atualizado somente para clientes através de contrato comercial de suporte. Para maiores informações, consulte a página sobre Oracle Java SE Support.  O mais importante aqui é você estar ciente sobre as datas de EOPU para as versões do Java SE da Oracle.Consulte a página do Oracle Java SE Support Roadmap e busque nesta página pela tabela com nome Java SE Public Updates. Nela você encontrará a data em que determinada versão do Java irá atingir EOPU. Como funciona o versionamento do Java?Em 2013, a Oracle divulgou um novo esquema de versionamento do Java para facilmente identificar quando é um release CPU e quando é um release LFR, e também para facilitar o planejamento e desenvolvimento de correções e features para futuras versões. CPU - Critical Patch UpdateAtualizações com correções de segurança. Versão será múltipla de 5, ou com soma de 1 para manter o número ímpar. Exemplos: 7u45, 7u51, 7u55. LFR - Limited Feature ReleaseAtualizações com correções de funcionalidade, melhorias de performance, e novos recursos. Versões de números pares múltiplos de 20, com final 0. Exemplos: 7u40, 7u60, 8u20. Qual a data da próxima atualização de segurança (CPU) do Java SE?Lançamentos do tipo CPU são controlados e pré-agendados pela Oracle e se aplicam a todos os produtos, inclusive o Oracle Java SE. Estes releases acontecem a cada 3 meses, sempre na Terça-feira mais próxima do dia 17 dos meses de Janeiro, Abril, Julho, e Outubro. Consulte a página Critical Patch Updates, Security Alerts and Third Party Bulleting para saber das próximas datas. Caso tenha interesse, você pode acompanhar através de recebimentos destes boletins diretamente no seu email. Veja como assinar o Boletim de Segurança da Oracle. Qual a data da próxima atualização de features (LFR) do Java SE?A Oracle reserva o direito de não divulgar estas datas, assim como o faz para todos os seus produtos. Entretanto é possível acompanhar o desenvolvimento da próxima versão pelos sites do projeto OpenJDK. A próxima versão do JDK 7 será o update 60 e binários beta Early Access já estão disponíveis para testes. A próxima versão doJDK 8 será o update 20 e binários beta Early Access já estão disponíveis para testes. Onde posso ver as mudanças e o que foi corrigido para a próxima versão do Java?A Oracle disponibiliza um changelog para cada binário beta Early Access divulgado no portal Java.net. JDK 7 update 60 changelogs JDK 8 update 20 changelogs Quando o Java da minha máquina (ou do meu usuário) vai expirar?Conheçendo o sistema de versionamento do Java e a periodicidade dos releases de CPU, o usuário pode determinar quando que um update do Java irá expirar. De todo modo, a cada novo update, a Oracle já informa quando que este update deverá expirar diretamente no release notes da versão. Por exemplo, no release notes da versão Oracle Java SE 7 update 55, está escrito na seção JRE Expiration Date o seguinte: The JRE expires whenever a new release with security vulnerability fixes becomes available. Critical patch updates, which contain security vulnerability fixes, are announced one year in advance on Critical Patch Updates, Security Alerts and Third Party Bulletin. This JRE (version 7u55) will expire with the release of the next critical patch update scheduled for July 15, 2014. For systems unable to reach the Oracle Servers, a secondary mechanism expires this JRE (version 7u55) on August 15, 2014. After either condition is met (new release becoming available or expiration date reached), the JRE will provide additional warnings and reminders to users to update to the newer version. For more information, see JRE Expiration Date.Ou seja, a versão 7u55 irá expirar com o lançamento do próximo release CPU, pré-agendado para o dia 15 de Julho de 2014. E caso o computador do usuário não possa se comunicar com o servidor da Oracle, esta versão irá expirar forçadamente no dia 15 de Agosto de 2014 (através de um mecanismo embutido na versão 7u55). O usuário não é obrigado a atualizar para versões LFR e portanto, mesmo com o release da versão 7u60, a versão atual 7u55 não irá expirar.Veja o release notes do Oracle Java SE 8 update 5. Encontrei um bug. Como posso reportar bugs ou problemas no Java SE, para a Oracle?Sempre que possível, faça testes com os binários beta antes da versão final ser lançada. Qualquer problema que você encontrar com estes binários beta, por favor descreva o problema através do fórum de Project Feebdack do JDK.Caso você encontre algum problema em uma versão final do Java, utilize o formulário de Bug Report. Importante: bugs reportados por estes sistemas não são considerados Suporte e portanto não há SLA de atendimento. A Oracle reserva o direito de manter o bug público ou privado, e também de informar ou não o usuário sobre o progresso da resolução do problema. Tenho uma dúvida que não foi respondida aqui. Como faço?Se você possui uma pergunta que não foi respondida aqui, envie para bruno.borges_at_oracle.com e caso ela seja pertinente, tentarei responder neste artigo. Para outras dúvidas, entre em contato pelo meu Twitter @brunoborges.

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• RPi and Java Embedded GPIO: Writing Java code to blink LED

  - by hinkmond

  So, you've followed the previous steps to install Java Embedded on your Raspberry Pi ?, you went to Fry's and picked up some jumper wires, LEDs, and resistors ?, you hooked up the wires, LED, and resistor the the correct pins ?, and now you want to start programming in Java on your RPi? Yes? ???????! OK, then... Here we go. You can use the following source code to blink your first LED on your RPi using Java. In the code you can see that I'm not using any complicated gpio libraries like wiringpi or pi4j, and I'm not doing any low-level pin manipulation like you can in C. And, I'm not using python (hell no!). This is Java programming, so we keep it simple (and more readable) than those other programming languages. See: Write Java code to do this In the Java code, I'm opening up the RPi Debian Wheezy well-defined file handles to control the GPIO ports. First I'm resetting everything using the unexport/export file handles. (On the RPi, if you open the well-defined file handles and write certain ASCII text to them, you can drive your GPIO to perform certain operations. See this GPIO reference). Next, I write a "1" then "0" to the value file handle of the GPIO0 port (see the previous pinout diagram). That makes the LED blink. Then, I loop to infinity. Easy, huh? import java.io.* /* * Java Embedded Raspberry Pi GPIO app */ package jerpigpio; import java.io.FileWriter; /** * * @author hinkmond */ public class JerpiGPIO { static final String GPIO_OUT = "out"; static final String GPIO_ON = "1"; static final String GPIO_OFF = "0"; static final String GPIO_CH00="0"; /** * @param args the command line arguments */ public static void main(String[] args) { FileWriter commandFile; try { /*** Init GPIO port for output ***/ // Open file handles to GPIO port unexport and export controls FileWriter unexportFile = new FileWriter("/sys/class/gpio/unexport"); FileWriter exportFile = new FileWriter("/sys/class/gpio/export"); // Reset the port unexportFile.write(GPIO_CH00); unexportFile.flush(); // Set the port for use exportFile.write(GPIO_CH00); exportFile.flush(); // Open file handle to port input/output control FileWriter directionFile = new FileWriter("/sys/class/gpio/gpio"+GPIO_CH00+"/direction"); // Set port for output directionFile.write(GPIO_OUT); directionFile.flush(); /*--- Send commands to GPIO port ---*/ // Opne file handle to issue commands to GPIO port commandFile = new FileWriter("/sys/class/gpio/gpio"+GPIO_CH00+"/value"); // Loop forever while (true) { // Set GPIO port ON commandFile.write(GPIO_ON); commandFile.flush(); // Wait for a while java.lang.Thread.sleep(200); // Set GPIO port OFF commandFile.write(GPIO_OFF); commandFile.flush(); // Wait for a while java.lang.Thread.sleep(200); } } catch (Exception exception) { exception.printStackTrace(); } } } Hinkmond

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• i don't receive mail notification...Nagios Core 4

  - by alessio

  I have a problem with automatically mail notification in Nagios Core 4 installed on ubuntu 12 .04 lts server... i have tried to send mail with nagios user and root user with the command: echo "test" | mail -s "test mail" [email protected] and i received mail correctly... but i don't receive any automatically mail notification... i don't know how can i do to resolve this issue! :( these are my configuration files (commands.cfg, contacts.cfg, nagios.log, mail.log): commands.cfg (the path /usr/bin/mail is the right path): # 'notify-host-by-email' command definition define command{ command_name notify-host-by-email command_line /usr/bin/printf "%b" "***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\nHost: $HOSTNAME$\nState: $HOSTSTATE$\nAddress: $HOSTADDRESS$\nInfo: $HOSTOUTPUT$\n\nDate/Time: $LONGDATETIME$\n" | /usr/bin/mail -s "** $NOTIFICATIONTYPE$ Host Alert: $HOSTNAME$ is $HOSTSTATE$ **" $CONTACTEMAIL$ } # 'notify-service-by-email' command definition define command{ command_name notify-service-by-email command_line /usr/bin/printf "%b" "***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\n\nService: $SERVICEDESC$\nHost: $HOSTALIAS$\nAddress: $HOSTADDRESS$\nState: $SERVICESTATE$\n\nDate/Time: $LONGDATETIME$\n\nAdditional Info:\n\n$SERVICEOUTPUT$\n" | /usr/bin/mail -s "** $NOTIFICATIONTYPE$ Service Alert: $HOSTALIAS$/$SERVICEDESC$ is $SERVICESTATE$ **" $CONTACTEMAIL$ } # 'process-host-perfdata' command definition define command{ command_name process-host-perfdata command_line /usr/bin/printf "%b" "$LASTHOSTCHECK$\t$HOSTNAME$\t$HOSTSTATE$\t$HOSTATTEMPT$\t$HOSTSTATETYPE$\t$HOSTEXECUTIONTIME$\t$HOSTOUTPUT$\t$HOSTPERFDATA$\n" >> /usr/local/nagios/var/host-perfdata.out } # 'process-service-perfdata' command definition define command{ command_name process-service-perfdata command_line /usr/bin/printf "%b" "$LASTSERVICECHECK$\t$HOSTNAME$\t$SERVICEDESC$\t$SERVICESTATE$\t$SERVICEATTEMPT$\t$SERVICESTATETYPE$\t$SERVICEEXECUTIONTIME$\t$SERVICELATENCY$\t$SERVICEOUTPUT$\t$SERVICEPERFDATA$\n" >> /usr/local/nagios/var/service-perfdata.out } contacts.cfg: define contact{ contact_name supporto alias Supporto Clienti DEA service_notification_period 24x7 host_notification_period 24x7 service_notification_options w,u,c,r host_notification_options d,r service_notification_commands notify-service-by-email host_notification_commands notify-host-by-email email [email protected] } define contactgroup{ contactgroup_name admins alias Nagios Administrators members supporto } nagios.log: [1401871412] SERVICE ALERT: fileserver;Current Users;OK;SOFT;2;USERS OK - 1 users currently logged in [1401871953] SERVICE ALERT: backups;Nagios Status;WARNING;SOFT;1;NAGIOS WARNING: 36 processes, status log updated 541 seconds ago [1401872133] SERVICE ALERT: backups;Nagios Status;OK;SOFT;2;NAGIOS OK: 36 processes, status log updated 180 seconds ago [1401872321] SERVICE ALERT: posta;Swap Usage;CRITICAL;SOFT;1;CRITICAL - Plugin timed out after 10 seconds [1401872322] SERVICE ALERT: fileserver;Current Users;CRITICAL;SOFT;1;CRITICAL - Plugin timed out after 10 seconds [1401872420] SERVICE ALERT: archivio;Disk Space;CRITICAL;SOFT;1;CRITICAL - Plugin timed out after 10 seconds [1401872492] SERVICE ALERT: fileserver;Current Users;OK;SOFT;2;USERS OK - 1 users currently logged in [1401872492] SERVICE ALERT: posta;Swap Usage;OK;SOFT;2;SWAP OK: 100% free (1984 MB out of 1984 MB) [1401872590] SERVICE ALERT: archivio;Disk Space;OK;SOFT;2;DISK OK [1401872931] Auto-save of retention data completed successfully. [1401873333] SERVICE ALERT: backups;Nagios Status;WARNING;SOFT;1;NAGIOS WARNING: 36 processes, status log updated 402 seconds ago [1401873513] SERVICE ALERT: backups;Nagios Status;OK;SOFT;2;NAGIOS OK: 36 processes, status log updated 180 seconds ago mail.log (i think that the problem is here but i don't know how to resolve it): Jun 4 10:00:01 backups sm-msp-queue[6109]: My unqualified host name (backups) unknown; sleeping for retry Jun 4 10:01:01 backups sm-msp-queue[6109]: unable to qualify my own domain name (backups) -- using short name Jun 4 10:20:01 backups sm-msp-queue[7247]: My unqualified host name (backups) unknown; sleeping for retry Jun 4 10:21:01 backups sm-msp-queue[7247]: unable to qualify my own domain name (backups) -- using short name Jun 4 10:40:01 backups sm-msp-queue[8327]: My unqualified host name (backups) unknown; sleeping for retry Jun 4 10:41:01 backups sm-msp-queue[8327]: unable to qualify my own domain name (backups) -- using short name Jun 4 11:00:01 backups sm-msp-queue[9549]: My unqualified host name (backups) unknown; sleeping for retry Jun 4 11:01:01 backups sm-msp-queue[9549]: unable to qualify my own domain name (backups) -- using short name Jun 4 11:20:01 backups sm-msp-queue[10678]: My unqualified host name (backups) unknown; sleeping for retry Jun 4 11:21:01 backups sm-msp-queue[10678]: unable to qualify my own domain name (backups) -- using short name i'm at the last step and i want to finish this Nagios Core! :) Any help be appreciate!:) host definition (this host have the disk almost full and it is in hard state but non notification) : define host{ use generic-host ; Name of host template to use host_name posta alias Server Posta ESA address 10.10.2.102 parents xen1, xen2 icon_image redhat.png statusmap_image redhat.gd2 } service definition: define service{ use generic-service host_name xen1, maestro, xen2, posta, nas002, serv2, esasrvmi02, esaubuntumi service_description Disk Space check_command ssh_all_disks!10%!5% } Notification is allowed for the contact definition you gave, but is it also allowed at the the service level ? sorry but i don't understand this thing! :(

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• How to install chrome autosave extension?

  - by Oguz Can Sertel

  I would like to install chrome autosave plugin on ubuntu. when I try to install it with these steps https://github.com/NV/chrome-devtools-autosave-server , I got some errors... there was not installed node and npm out of box on ubuntu 12.10. So I installed npm and node with these commands. sudo apt-get install npm sudo apt-get install node and I tried to install autosave here is the output: sudo npm install -g autosave npm http GET https://registry.npmjs.org/autosave npm http 304 https://registry.npmjs.org/autosave npm http GET https://registry.npmjs.org/commander npm http 304 https://registry.npmjs.org/commander /usr/local/bin/autosave -> /usr/local/lib/node_modules/autosave/bin/autosave > [email protected] install /usr/local/lib/node_modules/autosave > node ./scripts/install.js npm ERR! error installing [email protected] npm WARN This failure might be due to the use of legacy binary "node" npm WARN For further explanations, please read npm WARN /usr/share/doc/nodejs/README.Debian npm WARN npm ERR! [email protected] install: `node ./scripts/install.js` npm ERR! `sh "-c" "node ./scripts/install.js"` failed with 1 npm ERR! npm ERR! Failed at the [email protected] install script. npm ERR! This is most likely a problem with the autosave package, npm ERR! not with npm itself. npm ERR! Tell the author that this fails on your system: npm ERR! node ./scripts/install.js npm ERR! You can get their info via: npm ERR! npm owner ls autosave npm ERR! There is likely additional logging output above. npm ERR! npm ERR! System Linux 3.5.0-17-generic npm ERR! command "/usr/bin/nodejs" "/usr/bin/npm" "install" "-g" "autosave" npm ERR! cwd /home/naczu npm ERR! node -v v0.6.19 npm ERR! npm -v 1.1.4 npm ERR! code ELIFECYCLE npm ERR! message [email protected] install: `node ./scripts/install.js` npm ERR! message `sh "-c" "node ./scripts/install.js"` failed with 1 npm ERR! errno {} npm ERR! npm ERR! Additional logging details can be found in: npm ERR! /home/naczu/npm-debug.log npm not ok and here is README.debian nodejs for Debian ================= packaged modules ---------------- The global search path for modules is /usr/lib/nodejs Future packages of node modules will use that directory, so it should be used wisely. user modules ------------ Node looks for modules in ./node_modules directory first; please read node#modules documentation carefully for more information. Node does not look for modules in /usr/local/lib/node_modules, where npm put them. Please read npm-link(1) of npm package, to understand how to properly use npm-installed modules in a project. Note that require.paths is not supported in future node versions. See also node(1) for more information about NODE_PATH. nodejs command -------------- The upstream name for the Node.js interpreter command is "node". In Debian the interpreter command has been changed to "nodejs". This was done to prevent a namespace collision: other commands use the same name in their upstreams, such as ax25-node from the "node" package. Scripts calling Node.js as a shell command must be changed to instead use the "nodejs" command.

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• Building ATLAS (and later Octave w/ ATLAS)

  - by David Parks

  I'm trying to set up ATLAS (so I can later compile octave with ATLAS support). If I'm correct, I still need to build this manually due to the environment specific optimizations. I do see a package for ATLAS, but it looks like it's using the cross platform generic build options (e.g. "it'll be slow"). So, running the configure script as described in the docs seems to go poorly. As a java developer I never do well at making heads or tails of errors in these build processes. Am I missing dependencies (if so is there any documentation on what I need)? allusers@vbubuntu:~/Downloads/atlas3.10.1/build_vbubuntu$ ../configure -b 64 -D c -DPentiumCPS=3000 --with-netlib-lapack-tarfile=/home/allusers/Downloads/lapack-3.5.0.tgz make: `xconfig' is up to date. ./xconfig -d s /home/allusers/Downloads/atlas3.10.1/build_vbubuntu/../ -d b /home/allusers/Downloads/atlas3.10.1/build_vbubuntu -b 64 -D c -DPentiumCPS=3000 -Si lapackref 1 OS configured as Linux (1) Assembly configured as GAS_x8664 (2) Vector ISA Extension configured as SSE3 (6,448) ERROR: enum fam=3, chip=2, mach=0 make[3]: *** [atlas_run] Error 44 make[2]: *** [IRunArchInfo_x86] Error 2 Architecture configured as Corei1 (25) ERROR: enum fam=3, chip=2, mach=0 make[3]: *** [atlas_run] Error 44 make[2]: *** [IRunArchInfo_x86] Error 2 Clock rate configured as 2350Mhz ERROR: enum fam=3, chip=2, mach=0 make[3]: *** [atlas_run] Error 44 make[2]: *** [IRunArchInfo_x86] Error 2 Maximum number of threads configured as 4 Parallel make command configured as '$(MAKE) -j 4' ERROR: enum fam=3, chip=2, mach=0 make[3]: *** [atlas_run] Error 44 make[2]: *** [IRunArchInfo_x86] Error 2 Cannot detect CPU throttling. rm -f config1.out make atlas_run atldir=/home/allusers/Downloads/atlas3.10.1/build_vbubuntu exe=xprobe_comp redir=config1.out \ args="-v 0 -o atlconf.txt -O 1 -A 25 -Si nof77 0 -V 448 -b 64 -d b /home/allusers/Downloads/atlas3.10.1/build_vbubuntu" make[1]: Entering directory `/home/allusers/Downloads/atlas3.10.1/build_vbubuntu' cd /home/allusers/Downloads/atlas3.10.1/build_vbubuntu ; ./xprobe_comp -v 0 -o atlconf.txt -O 1 -A 25 -Si nof77 0 -V 448 -b 64 -d b /home/allusers/Downloads/atlas3.10.1/build_vbubuntu > config1.out make[2]: gfortran: Command not found make[2]: *** [IRunF77Comp] Error 127 make[2]: g77: Command not found make[2]: *** [IRunF77Comp] Error 127 make[2]: f77: Command not found make[2]: *** [IRunF77Comp] Error 127 Unable to find usable compiler for F77; abortingMake sure compilers are in your path, and specify good compilers to configure (see INSTALL.txt or 'configure --help' for details)make[1]: *** [atlas_run] Error 8 make[1]: Leaving directory `/home/allusers/Downloads/atlas3.10.1/build_vbubuntu' make: *** [IRun_comp] Error 2 ERROR 512 IN SYSCMND: 'make IRun_comp args="-v 0 -o atlconf.txt -O 1 -A 25 -Si nof77 0 -V 448 -b 64"' mkdir src bin tune interfaces mkdir: cannot create directory ‘src’: File exists mkdir: cannot create directory ‘bin’: File exists mkdir: cannot create directory ‘tune’: File exists mkdir: cannot create directory ‘interfaces’: File exists make: *** [make_subdirs] Error 1 make -f Make.top startup make[1]: Entering directory `/home/allusers/Downloads/atlas3.10.1/build_vbubuntu' Make.top:1: Make.inc: No such file or directory Make.top:325: warning: overriding commands for target `/AtlasTest' Make.top:76: warning: ignoring old commands for target `/AtlasTest' make[1]: *** No rule to make target `Make.inc'. Stop. make[1]: Leaving directory `/home/allusers/Downloads/atlas3.10.1/build_vbubuntu' make: *** [startup] Error 2 mv: cannot move ‘lapack-3.5.0’ to ‘../reference/lapack-3.5.0’: Directory not empty mv: cannot stat ‘lib/Makefile’: No such file or directory ../configure: 450: ../configure: cannot create lib/Makefile: Directory nonexistent ../configure: 451: ../configure: cannot create lib/Makefile: Directory nonexistent ../configure: 452: ../configure: cannot create lib/Makefile: Directory nonexistent ../configure: 453: ../configure: cannot create lib/Makefile: Directory nonexistent ../configure: 509: ../configure: cannot create lib/Makefile: Directory nonexistent DONE configure

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• SQL Azure: Notes on Building a Shard Technology

  - by Herve Roggero

  In Chapter 10 of the book on SQL Azure (http://www.apress.com/book/view/9781430229612) I am co-authoring, I am digging deeper in what it takes to write a Shard. It's actually a pretty cool exercise, and I wanted to share some thoughts on how I am designing the technology. A Shard is a technology that spreads the load of database requests over multiple databases, as transparently as possible. The type of shard I am building is called a Vertical Partition Shard  (VPS). A VPS is a mechanism by which the data is stored in one or more databases behind the scenes, but your code has no idea at design time which data is in which database. It's like having a mini cloud for records instead of services. Imagine you have three SQL Azure databases that have the same schema (DB1, DB2 and DB3), you would like to issue a SELECT * FROM Users on all three databases, concatenate the results into a single resultset, and order by last name. Imagine you want to ensure your code doesn't need to change if you add a new database to the shard (DB4). Now imagine that you want to make sure all three databases are queried at the same time, in a multi-threaded manner so your code doesn't have to wait for three database calls sequentially. Then, imagine you would like to obtain a breadcrumb (in the form of a new, virtual column) that gives you a hint as to which database a record came from, so that you could update it if needed. Now imagine all that is done through the standard SqlClient library... and you have the Shard I am currently building. Here are some lessons learned and techniques I am using with this shard: Parellel Processing: Querying databases in parallel is not too hard using the Task Parallel Library; all you need is to lock your resources when needed Deleting/Updating Data: That's not too bad either as long as you have a breadcrumb. However it becomes more difficult if you need to update a single record and you don't know in which database it is. Inserting Data: I am using a round-robin approach in which each new insert request is directed to the next database in the shard. Not sure how to deal with Bulk Loads just yet... Shard Databases:  I use a static collection of SqlConnection objects which needs to be loaded once; from there on all the Shard commands use this collection Extension Methods: In order to make it look like the Shard commands are part of the SqlClient class I use extension methods. For example I added ExecuteShardQuery and ExecuteShardNonQuery methods to SqlClient. Exceptions: Capturing exceptions in a multi-threaded code is interesting... but I kept it simple for now. I am using the ConcurrentQueue to store my exceptions. Database GUID: Every database in the shard is given a GUID, which is calculated based on the connection string's values. DataTable. The Shard methods return a DataTable object which can be bound to objects.  I will be sharing the code soon as an open-source project in CodePlex. Please stay tuned on twitter to know when it will be available (@hroggero). Or check www.bluesyntax.net for updates on the shard. Thanks!

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• first install for windows eight.....da beta

  - by raysmithequip

  The W8 preview is now installed and I am enjoying it.  I remember the learning curve of my first unix machine back in the eighties, this ain't that.It is normal for me to do the first os install with a keyboard and low end monitor...you never know what you'll encounter out in the field.  The OS took like a fish to water.  I used a low end INTEL motherboard dp55w I gathered on the cheap, an 1157 i5 from the used bin a pair of 6 gig ddr3 sticks, a rosewell 550 watt power supply a cheap used twenty buck sub 200g wd sata drive, a half working dvd burner and an asus fanless nvidia vid card, not a great one but Sub 50.00 on newey eggey...I did have to hunt the ms forums for a key and of course to activate the thing, if dos would of needed this outmoded ritual, we would still be on cpm and osborne would be a household name, of course little do people know that this ritual was common as far back as the seventies on att unix installs....not, but it was possible, I used to joke about when I ran a bbs, what hell would of been wrought had dos 3.2 machines been required to dial into my bbs to send fido mail to ms and wait for an acknowledgement.  All in all the thing was pushing a seven on the ms richter scale, not including the vid card, sadly it came in at just a tad over three....I wanted to evaluate it for a possible replacement on critical machines that in the past went down due to a vid card fan failure....you have no idea what a customer thinks when you show them a failed vid card fan..."you mean that little plastic piece of junk caused all this!!??!!!"...yea man.  Some production machines don't need any sort of vid, I will at least keep it on the maybe list for those, MTBF is a very important factor, some big box stores should put percentage of failure rate within 24 month estimates on the outside of the carton for sure.  And a warning that the power supplies are already at their limit.  Let's face it, today even 550w can be iffy.A few neat eye candy improvements over the earlier windows is nice, the metro screen is nice, anyone who has used a newer phone recently will intuitively drag their fingers across the screen....lot of good that was with no mouse or touch screen though.  Lucky me, I have been using windows since day one, I still have a copy of win 2.0 (and every other version) for no good reason.  Still the old ix collection of disks is much larger, recompiling any kernal is another silly ritual, same machine, different day, same recompile...argh. Rh is my all time fav, mandrake was always missing something, like it rewrote the init file or something, novell is ok as long as you stay on the beaten path and of course ubuntu normally recompiles with the same errors consistantly....makes life easy that way....no errors on windows eight, just a screen that did not match the installed hardware, natuarally I alt tabbed right out of it, then hit the flag key to find the start menu....no start button. I miss the start button already. Keyboard cowboy funnin and I was browsing the harddrive, nothing stunning there, I like that, means I can find stuff. Only I can't find what I want, the start button....the start menu is that first screen for touch tablets. No biggie for useruser, that is where they will want to be, I can see that. Admins won't want to be there, it is easy enough to get the control panel a bazzilion other ways though, just not the start button. (see a pattern here?). Personally, from the keyboard I find it fun to hit the carets along the location bar at the top of the explorer screen with tabs and arrows and choose SHOW ALL CONTROL PANEL ITEMS, or thereabouts. Bottom line, I love seven and I'll love eight even more!...very happy I did not have to follow the normal rule of thumb (a customer watching me build a system and asking questions said "oh I get it, so every piece you put in there is basically a hundred bucks, right?)...ok, sure, pretty much, more or less, well, ya dude.  It will be WAY past october till I get a real touch screen but I did pick up a pair of cheap tatungs so I can try the NEW main start screen, I parse a lot of folders and have a vision of how a pair of touch screens will be easier than landing a rover on mars.  Ok.  fine, they are way smallish, and I don't expect multitouch to work but we are talking a few percent of a new 21 inch viewsonic touch screen.  Will this OS be a game changer?  I don't know.  Bottom line with all the pads and droids in the world, it is more of a catch up move at first glance.  Not something ms is used to.  An app store?  I can see ms's motivation, the others have it.  I gather there will not be gadgets there, go ahead and see what ms did  to the once populated gadget page...go ahead, google gadgets and take a gander, used to hundreds of gadgets, they are already gone.  They replaced gadgets?  sort of, I'll drop that, it's a bit of a sore point for me.  More of interest was what happened when I downloaded stuff off codeplex and some other normal programs that I like, like orbitron, top o' my list!!...cardware it is...anyways, click on the exe, get a screen, normal for windows, this one indicated that I was not running a normal windows program and had a button for  exit the install, naw, I hit details, a hidden run program anyways came into view....great, my path to the normal windows has detected a program tha.....yea ok, acl is on, fine, moving along I got orbitron installed in record time and was tracking the iss on the newest Microsoft OS, beta of course, felt like the first time I setup bsd all those year ago...FUN!!...I suppose I gotta start to think about budgeting for the real os when it comes out in october, by then I should have a rasberry pi and be done with fedora remixed.  Of course that sounds like fun too!!  I would use this OS on a tablet or phone.  I don't like the idea of being hearded to an app store, don't like that on anything, we are americans and want real choices not marketed hype, lest you are younger with opm (other peoples money).   This os would be neat on a zune, but I suspect the zune is a gonner, I am rooting for microsoft, after all their default password is not admin anymore, nor alpine,  it's blank. Others force a password, my first fawn password was so long I could not even log into it with the password in front of me, who the heck uses %$# anyways, and if I was writing a brute force attack what the heck kinda impasse is that anyways at .00001 microseconds of a code execution cycle (just a non qualified number, not a real clock speed)....AI is where it will be before too long, MS is on that path, perhaps soon someone will sit down and write an app for the kinect that watches your eyes while you scan the new main start screen, clicking on the big E icon when you blink.....boy is that going to be fun!!!! sure. Blink,dammit,blink,dammit...... OPM no doubt.I like windows eight, we are moving forwards, better keep a close eye on ubuntu.  The real clinch comes when open source becomes paid source......don't blink, I already see plenty of very expensive 'ix apps, some even in app stores already.  more to come.......

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• Best Practices - Core allocation

  - by jsavit

  This post is one of a series of "best practices" notes for Oracle VM Server for SPARC (also called Logical Domains) Introduction SPARC T-series servers currently have up to 4 CPU sockets, each of which has up to 8 or (on SPARC T3) 16 CPU cores, while each CPU core has 8 threads, for a maximum of 512 dispatchable CPUs. The defining feature of Oracle VM Server for SPARC is that each domain is assigned CPU threads or cores for its exclusive use. This avoids the overhead of software-based time-slicing and emulation (or binary rewriting) of system state-changing privileged instructions used in traditional hypervisors. To create a domain, administrators specify either the number of CPU threads or cores that the domain will own, as well as its memory and I/O resources. When CPU resources are assigned at the individual thread level, the logical domains constraint manager attempts to assign threads from the same cores to a domain, and avoid "split core" situations where the same CPU core is used by multiple domains. Sometimes this is unavoidable, especially when domains are allocated and deallocated CPUs in small increments. Why split cores can matter Split core allocations can silenty reduce performance because multiple domains with different address spaces and memory contents are sharing the core's Level 1 cache (L1$). This is called false cache sharing since even identical memory addresses from different domains must point to different locations in RAM. The effect of this is increased contention for the cache, and higher memory latency for each domain using that core. The degree of performance impact can be widely variable. For applications with very small memory working sets, and with I/O bound or low-CPU utilization workloads, it may not matter at all: all machines wait for work at the same speed. If the domains have substantial workloads, or are critical to performance then this can have an important impact: This blog entry was inspired by a customer issue in which one CPU core was split among 3 domains, one of which was the control and service domain. The reported problem was increased I/O latency in guest domains, but the root cause might be higher latency servicing the I/O requests due to the control domain being slowed down. What to do about it Split core situations are easily avoided. In most cases the logical domain constraint manager will avoid it without any administrative action, but it can be entirely prevented by doing one of the several actions: Assign virtual CPUs in multiples of 8 - the number of threads per core. For example: ldm set-vcpu 8 mydomain or ldm add-vcpu 24 mydomain. Each domain will then be allocated on a core boundary. Use the whole core constraint when assigning CPU resources. This allocates CPUs in increments of entire cores instead of virtual CPU threads. The equivalent of the above commands would be ldm set-core 1 mydomain or ldm add-core 3 mydomain. Older syntax does the same thing by adding the -c flag to the add-vcpu, rm-vcpu and set-vcpu commands, but the new syntax is recommended. When whole core allocation is used an attempt to add cores to a domain fails if there aren't enough completely empty cores to satisfy the request. See https://blogs.oracle.com/sharakan/entry/oracle_vm_server_for_sparc4 for an excellent article on this topic by Eric Sharakan. Don't obsess: - if the workloads have minimal CPU requirements and don't need anywhere near a full CPU core, then don't worry about it. If you have low utilization workloads being consolidated from older machines onto a current T-series, then there's no need to worry about this or to assign an entire core to domains that will never use that much capacity. In any case, make sure the most important domains have their own CPU cores, in particular the control domain and any I/O or service domain, and of course any important guests. Summary Split core CPU allocation to domains can potentially have an impact on performance, but the logical domains manager tends to prevent this situation, and it can be completely and simply avoided by allocating virtual CPUs on core boundaries.

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• Communication between state machines with hidden transitions

  - by slartibartfast

  The question emerged for me in embedded programming but I think it can be applied to quite a number of general networking situations e.g. when a communication partner fails. Assume we have an application logic (a program) running on a computer and a gadget connected to that computer via e.g. a serial interface like RS232. The gadget has a red/green/blue LED and a button which disables the LED. The LEDs color can be driven by software commands over the serial interface and the state (red/green/blue/off) is read back and causes a reaction in the application logic. Asynchronous behaviour of the application logic with regard to the LED color down to a certain delay (depending on the execution cycle of the application) is tolerated. What we essentially have is a resource (the LED) which can not be reserved and handled atomically by software because the (organic) user can at any time press the button to interfere/break the software attempt to switch the LED color. Stripping this example from its physical outfit I dare to say that we have two communicating state machines A (application logic) and G (gadget) where G executes state changes unbeknownst to A (and also the other way round, but this is not significant in our example) and only A can be modified at a reasonable price. A needs to see the reaction and state of G in one piece of information which may be (slightly) outdated but not inconsistent with respect to the short time window when this information was generated on the side of G. What I am looking for is a concise method to handle such a situation in embedded software (i.e. no layer/framework like CORBA etc. available). A programming technique which is able to map the complete behaviour of both participants on classical interfaces of a classical programming language (C in this case). To complicate matters (or rather, to generalize), a simple high frequency communication cycle of A to G and back (IOW: A is rapidly polling G) is out of focus because of technical restrictions (delay of serial com, A not always active, etc.). What I currently see as a general solution is: the application logic A as one thread of execution an adapter object (proxy) PG (presenting G inside the computer), together with the serial driver as another thread a communication object between the two (A and PG) which is transactionally safe to exchange The two execution contexts (threads) on the computer may be multi-core or just interrupt driven or tasks in an RTOS. The com object contains the following data: suspected state (written by A): effectively a member of the power set of states in G (in our case: red, green, blue, off, red_or_green, red_or_blue, red_or_off...etc.) command data (written by A): test_if_off, switch_to_red, switch_to_green, switch_to_blue operation status (written by PG): operation_pending, success, wrong_state, link_broken new state (written by PG): red, green, blue, off The idea of the com object is that A writes whichever (set of) state it thinks G is in, together with a command. (Example: suspected state="red_or_green", command: "switch_to_blue") Notice that the commands issued by A will not work if the user has switched off the LED and A needs to know this. PG will pick up such a com object and try to send the command to G, receive its answer (or a timeout) and set the operation status and new state accordingly. A will take back the oject once it is no longer at operation_pending and can react to the outcome. The com object could be separated of course (into two objects, one for each direction) but I think it is convenient in nearly all instances to have the command close to the result. I would like to have major flaws pointed out or hear an entirely different view on such a situation.

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• Can grub handle same release (3.6) but new rc (rc5)?

  - by hhoyt

  can grub handle newer kerner rc ? I am running 3.6.0-rc4 ok, grub update definitely recognizes all required files for rc5, but edit of grub.cfg only shows rc4 after grub-update. D/N matter whether I generate kernel 3.6.0-rc5 or whether I install the .deb files. Generating grub.cfg ... using custom appearance settings Found background image: /usr/share/peppermint/wallpapers/Peppermint.jpg Found linux image: /boot/vmlinuz-3.6.0-030600rc5-generic Found linux image: /boot/vmlinuz-3.6.0-030600rc4-generic Found initrd image: /boot/initrd.img-3.6.0-030600rc4-generic Found linux image: /boot/vmlinuz-3.6.0-rc5 Found initrd image: /boot/initrd.img-3.6.0-rc5 Found linux image: /boot/vmlinuz-3.6.0-rc5.old Found initrd image: /boot/initrd.img-3.6.0-rc5 Found linux image: /boot/vmlinuz-3.5.3 Found initrd image: /boot/initrd.img-3.5.3 Found linux image: /boot/vmlinuz-3.5.3.old Found initrd image: /boot/initrd.img-3.5.3 Found linux image: /boot/vmlinuz-3.5.0-13-generic Found initrd image: /boot/initrd.img-3.5.0-13-generic Found Ubuntu 10.04.1 LTS (10.04) on /dev/sda1 Found Ubuntu 10.04.4 LTS (10.04) on /dev/sda10 Found Peppermint Two (2) on /dev/sda15 Found Ubuntu 10.10 (10.10) on /dev/sda16 Found Windows 7 (loader) on /dev/sda3 Found Ubuntu 11.04 (11.04) on /dev/sda5 Found Ubuntu 12.04.1 LTS (12.04) on /dev/sda6 Found Linux Mint 12 LXDE (12) on /dev/sda8 Found MS-DOS 5.x/6.x/Win3.1 on /dev/sdc1 If I press 'e' on boot startup of rc4 and manually change it to rc5 and ctrl-x, it comes up fine. I just cannot get grub.cfg to update such that rc4 is included. Thanks, Howard # DO NOT EDIT THIS FILE # It is automatically generated by grub-mkconfig using templates from /etc/grub.d and settings from /etc/default/grub # BEGIN /etc/grub.d/00_header if [ -s $prefix/grubenv ]; then set have_grubenv=true load_env fi set default="Windows 7 (loader) (on /dev/sda3)" if [ "${prev_saved_entry}" ]; then set saved_entry="${prev_saved_entry}" save_env saved_entry set prev_saved_entry= save_env prev_saved_entry set boot_once=true fi function savedefault { if [ -z "${boot_once}" ]; then saved_entry="${chosen}" save_env saved_entry fi } function recordfail { set recordfail=1 if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi } function load_video { insmod vbe insmod vga insmod video_bochs insmod video_cirrus } insmod part_msdos insmod ext2 set root='(hd1,msdos1)' search --no-floppy --fs-uuid --set=root 218e9f6f-c21e-4c50-90a5-5a40be639b66 if loadfont /usr/share/grub/unicode.pf2 ; then set gfxmode=640x480 load_video insmod gfxterm insmod part_msdos insmod ext2 set root='(hd1,msdos1)' search --no-floppy --fs-uuid --set=root 218e9f6f-c21e-4c50-90a5-5a40be639b66 set locale_dir=($root)/boot/grub/locale set lang=en_US insmod gettext fi terminal_output gfxterm if [ "${recordfail}" = 1 ]; then set timeout=-1 else set timeout=10 fi END /etc/grub.d/00_header BEGIN /etc/grub.d/05_debian_theme insmod part_msdos insmod ext2 set root='(hd1,msdos1)' search --no-floppy --fs-uuid --set=root 218e9f6f-c21e-4c50-90a5-5a40be639b66 insmod jpeg if background_image /usr/share/peppermint/wallpapers/Peppermint.jpg; then set color_normal=light-gray/black set color_highlight=magenta/black else set menu_color_normal=white/black set menu_color_highlight=black/light-gray fi END /etc/grub.d/05_debian_theme BEGIN /etc/grub.d/10_linux_proxy menuentry "Peppermint, with Linux 3.6.0-030600rc4-generic" --class peppermint --class gnu-linux --class gnu --class os { recordfail insmod gzio insmod part_msdos insmod ext2 set root='(hd1,msdos1)' search --no-floppy --fs-uuid --set=root 218e9f6f-c21e-4c50-90a5-5a40be639b66 linux /boot/vmlinuz-3.6.0-030600rc4-generic root=UUID=218e9f6f-c21e-4c50-90a5-5a40be639b66 ro initrd /boot/initrd.img-3.6.0-030600rc4-generic } END /etc/grub.d/10_linux_proxy BEGIN /etc/grub.d/30_os-prober_proxy menuentry "Peppermint, with Linux 3.6.0-030600rc4-generic (on /dev/sda15)" --class gnu-linux --class gnu --class os { insmod part_msdos insmod ext2 set root='(hd0,msdos15)' search --no-floppy --fs-uuid --set=root 21a3d91a-ae43-4f51-b8d6-7f3dc80967d7 linux /boot/vmlinuz-3.6.0-030600rc4-generic root=UUID=21a3d91a-ae43-4f51-b8d6-7f3dc80967d7 ro splash quiet splash vt.handoff=7 initrd /boot/initrd.img-3.6.0-030600rc4-generic } menuentry "Ubuntu, with Linux 3.0.0-24-generic (on /dev/sda10)" --class gnu-linux --class gnu --class os { insmod part_msdos insmod ext2 set root='(hd0,msdos10)' search --no-floppy --fs-uuid --set=root 6c9a0149-3045-4335-83fa-a2513ca3a250 linux /boot/vmlinuz-3.0.0-24-generic root=UUID=6c9a0149-3045-4335-83fa-a2513ca3a250 ro crashkernel=384M-2G:64M,2G-:128M splash initrd /boot/initrd.img-3.0.0-24-generic } menuentry "Ubuntu, with Linux 3.5.0-030500rc7-generic (on /dev/sda10)" --class gnu-linux --class gnu --class os { insmod part_msdos insmod ext2 set root='(hd0,msdos10)' search --no-floppy --fs-uuid --set=root 6c9a0149-3045-4335-83fa-a2513ca3a250 linux /boot/vmlinuz-3.5.0-030500rc7-generic root=UUID=6c9a0149-3045-4335-83fa-a2513ca3a250 ro crashkernel=384M-2G:64M,2G-:128M splash initrd /boot/initrd.img-3.5.0-030500rc7-generic } menuentry "Peppermint, with Linux 3.3.0-030300rc2-generic (on /dev/sda15)" --class gnu-linux --class gnu --class os { insmod part_msdos insmod ext2 set root='(hd0,msdos15)' search --no-floppy --fs-uuid --set=root 21a3d91a-ae43-4f51-b8d6-7f3dc80967d7 linux /boot/vmlinuz-3.3.0-030300rc2-generic root=UUID=21a3d91a-ae43-4f51-b8d6-7f3dc80967d7 ro splash quiet splash vt.handoff=7 initrd /boot/initrd.img-3.3.0-030300rc2-generic } menuentry "Ubuntu, with Linux 2.6.39-rc5-candela (on /dev/sda16)" --class gnu-linux --class gnu --class os { insmod part_msdos insmod ext2 set root='(hd0,msdos16)' search --no-floppy --fs-uuid --set=root 48fcb5ec-b51b-4afd-b0e5-a2aace66f6e1 linux /boot/vmlinuz-2.6.39-rc5-candela root=/dev/sda7 ro splash initrd /boot/initrd.img-2.6.39-rc5-candela } menuentry "Windows 7 (loader) (on /dev/sda3)" --class windows --class os { insmod part_msdos insmod ntfs set root='(hd0,msdos3)' search --no-floppy --fs-uuid --set=root EA3EFABB3EFA7FBD chainloader +1 } menuentry "Ubuntu, with Linux 2.6.38-13-generic (on /dev/sda5)" --class gnu-linux --class gnu --class os { insmod part_msdos insmod ext2 set root='(hd0,msdos5)' search --no-floppy --fs-uuid --set=root bcfe855e-a449-429d-b204-c667e129a4bd linux /boot/vmlinuz-2.6.38-13-generic root=UUID=bcfe855e-a449-429d-b204-c667e129a4bd ro quiet splash vt.handoff=7 initrd /boot/initrd.img-2.6.38-13-generic } menuentry "Ubuntu, with Linux 3.2.0-29-generic-pae (on /dev/sda6)" --class gnu-linux --class gnu --class os { insmod part_msdos insmod ext2 set root='(hd0,msdos6)' search --no-floppy --fs-uuid --set=root 369605ad-1a92-4b7d-abb5-ce75cbdfc9c1 linux /boot/vmlinuz-3.2.0-29-generic-pae root=UUID=369605ad-1a92-4b7d-abb5-ce75cbdfc9c1 ro quiet splash $vt_handoff initrd /boot/initrd.img-3.2.0-29-generic-pae } menuentry "Ubuntu, with Linux 3.2.0-23-generic-pae (on /dev/sda6)" --class gnu-linux --class gnu --class os { insmod part_msdos insmod ext2 set root='(hd0,msdos6)' search --no-floppy --fs-uuid --set=root 369605ad-1a92-4b7d-abb5-ce75cbdfc9c1 linux /boot/vmlinuz-3.2.0-23-generic-pae root=UUID=369605ad-1a92-4b7d-abb5-ce75cbdfc9c1 ro quiet splash $vt_handoff initrd /boot/initrd.img-3.2.0-23-generic-pae } menuentry "Linux Mint 12 LXDE, 3.0.0-12-generic (/dev/sda8) (on /dev/sda8)" --class gnu-linux --class gnu --class os { insmod part_msdos insmod ext2 set root='(hd0,msdos8)' search --no-floppy --fs-uuid --set=root ccdc67ed-e81c-4f85-9b75-fe0c24c65bb8 linux /boot/vmlinuz-3.0.0-12-generic root=UUID=ccdc67ed-e81c-4f85-9b75-fe0c24c65bb8 ro quiet splash vt.handoff=7 initrd /boot/initrd.img-3.0.0-12-generic } menuentry "MS-DOS 5.x/6.x/Win3.1 (on /dev/sdc1)" --class windows --class os { insmod part_msdos insmod ntfs set root='(hd2,msdos1)' search --no-floppy --fs-uuid --set=root A8F0DE02F0DDD6A2 drivemap -s (hd0) ${root} chainloader +1 } END /etc/grub.d/30_os-prober_proxy BEGIN /etc/grub.d/40_custom This file provides an easy way to add custom menu entries. Simply type the menu entries you want to add after this comment. Be careful not to change the 'exec tail' line above. END /etc/grub.d/40_custom BEGIN /etc/grub.d/41_custom if [ -f $prefix/custom.cfg ]; then source $prefix/custom.cfg; fi END /etc/grub.d/41_custom

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• Running Powershell from within SharePoint

  - by Norgean

  Just because something is a daft idea, doesn't mean it can't be done. We sometimes need to do some housekeeping - like delete old files or list items or… yes, well, whatever you use Powershell for in a SharePoint world. Or it could be that your solution has "issues" for which you have Powershell solutions, but not the budget to transform into proper bug fixes. So you create a "how to" for the ITPro guys. Idea: What if we keep the scripts in a list, and have SharePoint execute the scripts on demand? An announcements list (because of the multiline body field). Warning! Let us be clear. This list needs to be locked down; if somebody creates a malicious script and you run it, I cannot help you. First; we need to figure out how to start Powershell scripts from C#. Hit teh interwebs and the Googlie, and you may find jpmik's post: http://www.codeproject.com/Articles/18229/How-to-run-PowerShell-scripts-from-C. (Or MS' official answer at http://msdn.microsoft.com/en-us/library/ee706563(v=vs.85).aspx) public string RunPowershell(string powershellText, SPWeb web, string param1, string param2) { // Powershell ~= RunspaceFactory - i.e. Create a powershell context var runspace = RunspaceFactory.CreateRunspace(); var resultString = new StringBuilder(); try { // load the SharePoint snapin - Note: you cannot do this in the script itself (i.e. add-pssnapin etc does not work) PSSnapInException snapInError; runspace.RunspaceConfiguration.AddPSSnapIn("Microsoft.SharePoint.PowerShell", out snapInError); runspace.Open(); // set a web variable. runspace.SessionStateProxy.SetVariable("webContext", web); // and some user defined parameters runspace.SessionStateProxy.SetVariable("param1", param1); runspace.SessionStateProxy.SetVariable("param2", param2); var pipeline = runspace.CreatePipeline(); pipeline.Commands.AddScript(powershellText); // add a "return" variable pipeline.Commands.Add("Out-String"); // execute! var results = pipeline.Invoke(); // convert the script result into a single string foreach (PSObject obj in results) { resultString.AppendLine(obj.ToString()); } } finally { // close the runspace runspace.Close(); } // consider logging the result. Or something. return resultString.ToString(); } Ok. We've written some code. Let us test it. var runner = new PowershellRunner(); runner.RunPowershellScript(@" $web = Get-SPWeb 'http://server/web' # or $webContext $web.Title = $param1 $web.Update() $web.Dispose() ", null, "New title", "not used"); Next step: Connect the code to the list, or more specifically, have the code execute on one (or several) list items. As there are more options than readers, I'll leave this as an exercise for the reader. Some alternatives: Create a ribbon button that calls RunPowershell with the body of the selected itemsAdd a layout pageSpecify list item from query string (possibly coupled with content editor webpart with html that links directly to this page with querystring)WebpartListing with an "execute" columnList with multiselect and an execute button Etc!Now that you have the code for executing powershell scripts, you can easily expand this into a timer job, which executes scripts at regular intervals. But if the previous solution was dangerous, this is even worse - the scripts will usually be run with one of the admin accounts, and can do pretty much anything...One more thing... Note that as this is running "consoleless" calls to Write-Host will fail. Two solutions; remove all output, or check if the script is run in a console-window or not.  if ($host.Name -eq "ConsoleHost") { Write-Host 'If I agreed with you we'd both be wrong' }

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• Teminal non-responsive on load, can't enter anything until CTRL+C

  - by Silver Light

  Hello! I have an issue with terminal in Ubuntu 10.04. When I launch it, it hangs, like this: I cannot do anything until I press CTRL+C: I cannot remember when this started. What can be wrong? Looks like teminal is loading or processing something each time it loads. How can I diagnose and solve this problem? EDIT: Here are the conents of ~/.bashrc: # ~/.bashrc: executed by bash(1) for non-login shells. # see /usr/share/doc/bash/examples/startup-files (in the package bash-doc) # for examples # If not running interactively, don't do anything [ -z "$PS1" ] && return # don't put duplicate lines in the history. See bash(1) for more options # ... or force ignoredups and ignorespace HISTCONTROL=ignoredups:ignorespace # append to the history file, don't overwrite it shopt -s histappend # for setting history length see HISTSIZE and HISTFILESIZE in bash(1) HISTSIZE=1000 HISTFILESIZE=2000 # check the window size after each command and, if necessary, # update the values of LINES and COLUMNS. shopt -s checkwinsize # make less more friendly for non-text input files, see lesspipe(1) [ -x /usr/bin/lesspipe ] && eval "$(SHELL=/bin/sh lesspipe)" # set variable identifying the chroot you work in (used in the prompt below) if [ -z "$debian_chroot" ] && [ -r /etc/debian_chroot ]; then debian_chroot=$(cat /etc/debian_chroot) fi # set a fancy prompt (non-color, unless we know we "want" color) case "$TERM" in xterm-color) color_prompt=yes;; esac # uncomment for a colored prompt, if the terminal has the capability; turned # off by default to not distract the user: the focus in a terminal window # should be on the output of commands, not on the prompt #force_color_prompt=yes if [ -n "$force_color_prompt" ]; then if [ -x /usr/bin/tput ] && tput setaf 1 >&/dev/null; then # We have color support; assume it's compliant with Ecma-48 # (ISO/IEC-6429). (Lack of such support is extremely rare, and such # a case would tend to support setf rather than setaf.) color_prompt=yes else color_prompt= fi fi if [ "$color_prompt" = yes ]; then PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ ' else PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ ' fi unset color_prompt force_color_prompt # If this is an xterm set the title to user@host:dir case "$TERM" in xterm*|rxvt*) PS1="\[\e]0;${debian_chroot:+($debian_chroot)}\u@\h: \w\a\]$PS1" ;; *) ;; esac # enable color support of ls and also add handy aliases if [ -x /usr/bin/dircolors ]; then test -r ~/.dircolors && eval "$(dircolors -b ~/.dircolors)" || eval "$(dircolors -b)" alias ls='ls --color=auto' #alias dir='dir --color=auto' #alias vdir='vdir --color=auto' alias grep='grep --color=auto' alias fgrep='fgrep --color=auto' alias egrep='egrep --color=auto' fi # some more ls aliases alias ll='ls -alF' alias la='ls -A' alias l='ls -CF' # Add an "alert" alias for long running commands. Use like so: # sleep 10; alert alias alert='notify-send --urgency=low -i "$([ $? = 0 ] && echo terminal || echo error)" "$(history|tail -n1|sed -e '\''s/^\s*[0-9]\+\s*//;s/[;&|]\s*alert$//'\'')"' # Alias definitions. # You may want to put all your additions into a separate file like # ~/.bash_aliases, instead of adding them here directly. # See /usr/share/doc/bash-doc/examples in the bash-doc package. if [ -f ~/.bash_aliases ]; then . ~/.bash_aliases fi # enable programmable completion features (you don't need to enable # this, if it's already enabled in /etc/bash.bashrc and /etc/profile # sources /etc/bash.bashrc). if [ -f /etc/bash_completion ] && ! shopt -oq posix; then . /etc/bash_completion fi # Source .profile if [ -f ~/.profile ]; then . ~/.profile fi Setting -x at the beginning showed me that it tries to repeat this without stopping: +++++++++++++++++++ '[' 'complete -f -X '\''!*.@(pdf|PDF)'\'' acroread gpdf xpdf' '!=' 'complete -f -X '\''!*.@(pdf|PDF)'\'' acroread gpdf xpdf' ']' +++++++++++++++++++ line='complete -f -X '\''!*.@(pdf|PDF)'\'' acroread gpdf xpdf' +++++++++++++++++++ line='complete -f -X '\''!*.@(pdf|PDF)'\'' acroread gpdf xpdf' +++++++++++++++++++ line=' acroread gpdf xpdf' +++++++++++++++++++ list=("${list[@]}" $line) +++++++++++++++++++ read line

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• Teminal hands on load, can't enter anything until CTRL+C

  - by Silver Light

  Hello! I have an issue with terminal in Ubuntu 10.04. When I launch it, it hangs, like this: I cannot do anything until I press CTRL+C: I cannot remember when this started. What can be wrong? Looks like teminal is loading or processing something each time it loads. How can I diagnose and solve this problem? EDIT: Here are the conents of ~/.bashrc: # ~/.bashrc: executed by bash(1) for non-login shells. # see /usr/share/doc/bash/examples/startup-files (in the package bash-doc) # for examples # If not running interactively, don't do anything [ -z "$PS1" ] && return # don't put duplicate lines in the history. See bash(1) for more options # ... or force ignoredups and ignorespace HISTCONTROL=ignoredups:ignorespace # append to the history file, don't overwrite it shopt -s histappend # for setting history length see HISTSIZE and HISTFILESIZE in bash(1) HISTSIZE=1000 HISTFILESIZE=2000 # check the window size after each command and, if necessary, # update the values of LINES and COLUMNS. shopt -s checkwinsize # make less more friendly for non-text input files, see lesspipe(1) [ -x /usr/bin/lesspipe ] && eval "$(SHELL=/bin/sh lesspipe)" # set variable identifying the chroot you work in (used in the prompt below) if [ -z "$debian_chroot" ] && [ -r /etc/debian_chroot ]; then debian_chroot=$(cat /etc/debian_chroot) fi # set a fancy prompt (non-color, unless we know we "want" color) case "$TERM" in xterm-color) color_prompt=yes;; esac # uncomment for a colored prompt, if the terminal has the capability; turned # off by default to not distract the user: the focus in a terminal window # should be on the output of commands, not on the prompt #force_color_prompt=yes if [ -n "$force_color_prompt" ]; then if [ -x /usr/bin/tput ] && tput setaf 1 >&/dev/null; then # We have color support; assume it's compliant with Ecma-48 # (ISO/IEC-6429). (Lack of such support is extremely rare, and such # a case would tend to support setf rather than setaf.) color_prompt=yes else color_prompt= fi fi if [ "$color_prompt" = yes ]; then PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ ' else PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ ' fi unset color_prompt force_color_prompt # If this is an xterm set the title to user@host:dir case "$TERM" in xterm*|rxvt*) PS1="\[\e]0;${debian_chroot:+($debian_chroot)}\u@\h: \w\a\]$PS1" ;; *) ;; esac # enable color support of ls and also add handy aliases if [ -x /usr/bin/dircolors ]; then test -r ~/.dircolors && eval "$(dircolors -b ~/.dircolors)" || eval "$(dircolors -b)" alias ls='ls --color=auto' #alias dir='dir --color=auto' #alias vdir='vdir --color=auto' alias grep='grep --color=auto' alias fgrep='fgrep --color=auto' alias egrep='egrep --color=auto' fi # some more ls aliases alias ll='ls -alF' alias la='ls -A' alias l='ls -CF' # Add an "alert" alias for long running commands. Use like so: # sleep 10; alert alias alert='notify-send --urgency=low -i "$([ $? = 0 ] && echo terminal || echo error)" "$(history|tail -n1|sed -e '\''s/^\s*[0-9]\+\s*//;s/[;&|]\s*alert$//'\'')"' # Alias definitions. # You may want to put all your additions into a separate file like # ~/.bash_aliases, instead of adding them here directly. # See /usr/share/doc/bash-doc/examples in the bash-doc package. if [ -f ~/.bash_aliases ]; then . ~/.bash_aliases fi # enable programmable completion features (you don't need to enable # this, if it's already enabled in /etc/bash.bashrc and /etc/profile # sources /etc/bash.bashrc). if [ -f /etc/bash_completion ] && ! shopt -oq posix; then . /etc/bash_completion fi # Source .profile if [ -f ~/.profile ]; then . ~/.profile fi Setting -x at the beginning showed me that it tries to repeat this without stopping: +++++++++++++++++++ '[' 'complete -f -X '\''!*.@(pdf|PDF)'\'' acroread gpdf xpdf' '!=' 'complete -f -X '\''!*.@(pdf|PDF)'\'' acroread gpdf xpdf' ']' +++++++++++++++++++ line='complete -f -X '\''!*.@(pdf|PDF)'\'' acroread gpdf xpdf' +++++++++++++++++++ line='complete -f -X '\''!*.@(pdf|PDF)'\'' acroread gpdf xpdf' +++++++++++++++++++ line=' acroread gpdf xpdf' +++++++++++++++++++ list=("${list[@]}" $line) +++++++++++++++++++ read line

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• MVC Communication Pattern

  - by Kedu

  This is kind of a follow up question to this http://stackoverflow.com/questions/23743285/model-view-controller-and-callbacks, but I wanted to post it separately, because its kind of a different topic. I'm working on a multiplayer cardgame for the Android platform. I split the project into MVC which fits the needs pretty good, but I'm currently stuck because I can't figure out a good way to communicate between the different parts. I have everything setup and working with the controller being a big state machine, which is called over and over from the gameloop, and calls getter methods from the GUI and the android/network part to get the input. The input itself in the GUI and network is set by inputlisteners that set a local variable which I read in the getter method. So far so good, this is working. But my problem is, the controller has to check every input separately,so if I want to add an input I have to check in which states its valid and call the getter method from all these states. This is not good, and lets the code look pretty ugly, makes additions uncomfortable and adds redundance. So what I've got from the question I mentioned above is that some kind of command or event pattern will fit my needs. What I want to do is to create a shared and threadsafe queue in the controller and instead of calling all these getter methods, I just check the queue for new input and proceed it. On the other side, the GUI and network don't have all these getters, but instead create an event or command and send it to the controller through, for example, observer/observable. Now my problem: I can't figure out a way, for these commands/events to fit a common interface (which the queue can store) and still transport different kind of data (button clicks, cards that are played, the player id the command comes from, synchronization data etc.). If I design the communication as command pattern, I have to stick all the information that is needed to execute the command into it when its created, that's impossible because the GUI or network has no knowledge of all the things the controller needs to execute stuff that needs to be done when for example a card is played. I thought about getting this stuff into the command when executing it. But over all the different commands I have, I would need all the information the controller has, and thus give the command a reference to the controller which would make everything in it public, which is real bad design I guess. So, I could try some kind of event pattern. I have to transport data in the event. So, like the command, I would have an interface, which all events have in common, and can be stored in the shared queue. I could create a big enum with all the different events that a are possible, save one of these enums in the actual event, and build a big switch case for the events, to proceed different stuff for different events. The problem here: I have different data for all the events. But I need a common interface, to store the events in a queue. How do I get the specific data, if I can only access the event through the interface? Even if that wouldn't be a problem, I'm creating another big switch case, which looks ugly, and when i want to add a new event, I have to create the event itself, the case, the enum, and the method that's called with the data. I could of course check the event with the enum and cast it to its type, so I can call event type specific methods that give me the data I need, but that looks like bad design too.

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• MVVM/Presentation Model With WinForms

  - by Erik Ashepa

  Hi, I'm currently working on a brownfield application, it's written with winforms, as a preparation to use WPF in a later version, out team plans to at least use the MVVM/Presentation model, and bind it against winforms... I've explored the subject, including the posts in this site (which i love very much), when boiled down, the main advantage of wpf are : binding controls to properties in xaml. binding commands to command objects in the viewmodel. the first feature is easy to implement (in code), or with a generic control binder, which binds all the controls in the form. the second feature is a little harder to implement, but if you inherit from all your controls and add a command property (which is triggered by an internal event such as click), which is binded to a command instance in the ViewModel. The challenges I'm currently aware of are : implementing a commandmanager, (which will trigger the CanInvoke method of the commands as necessery. winforms only supports one level of databinding : datasource, datamember, wpf is much more flexible. am i missing any other major features that winforms lacks in comparison with wpf, when attempting to implement this design pattern? i sure many of you will recommend some sort of MVP pattern, but MVVM/Presentation model is the way to go for me, because I'll want future WPF support. Thanks in advance, Erik.

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• Home automation using Arduino / XMPP client for Arduino

  - by Ashish

  I am trying to setup a system for automating certain tasks in my home. I am thinking of a solution wherein a server side application would be able to send/receive commands/data to Arduino (attached with Arduino Ethernet Shield) via the web. Here the Arduino may both act as a sensor interface to the server application or command executor interface for the server app. E.g. (user story): The overhead water tank in my house has a water level sensor attached with Arduino (attached with Arduino Ethernet Shield). Another Arduino (attached with Arduino Ethernet Shield) is attached with a relay/latch. This relay/latch is then connected to a water pump. Now the server side application on the web is able to get/receive water level information from the Arduino on the water tank. Depending on the water level information received, the web application should send suitable signals/commands to Arduino on water pump to switch 'ON' or switch 'OFF' the water pump. Now for such a system to work across the web, I am thinking of using one of the type of solutions in order of my priority: Using XMPP for communication between server application and Arduino. Using HTTP polling. Using HTTP hanging GET. For solution number 1, I need to implement a XMPP client that would reside on Arduino. Is it possible to write a XMPP client small enough to reside on an Arduino? If yes what are the minimum possible XMPP client functionality that I need to write for Arduino, so that it would be able to contact XMPP servers solutions like GTalk, etc.? For solution number 2 and 3 I need guidance in implementation. Also which solution would be cost effective and easily extendable?

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• Setting the Classpath and Accessing code from book: Programming Clojure

  - by user130153

  (I posted this same question on the Clojure list but haven't got an answer yet. Is anyone here ready to help?) I am going through Programming Clojure and I recently downloaded the code from the books official website. For other utils I can do, for example, (require 'clojure.contrib.str-utils) and it works. But how do I load code from the book? (require 'examples.introduction) throws the following exception: java.io.FileNotFoundException: Could not locate examples/ introduction__init.class or examples/introduction.clj on classpath: (NO_SOURCE_FILE:0) [Thrown class clojure.lang.Compiler$CompilerException] Here is the full backtrace: Backtrace: 0: clojure.lang.Compiler.eval(Compiler.java:4543) 1: clojure.core$eval__3990.invoke(core.clj:1728) 2: swank.commands.basic$eval_region__686.invoke(basic.clj:36) 3: swank.commands.basic$listener_eval__695.invoke(basic.clj:50) 4: clojure.lang.Var.invoke(Var.java:346) 5: user$eval__1200.invoke(NO_SOURCE_FILE) 6: clojure.lang.Compiler.eval(Compiler.java:4532) 7: clojure.core$eval__3990.invoke(core.clj:1728) 8: swank.core$eval_in_emacs_package__307.invoke(core.clj:55) 9: swank.core$eval_for_emacs__384.invoke(core.clj:123) 10: clojure.lang.Var.invoke(Var.java:354) 11: clojure.lang.AFn.applyToHelper(AFn.java:179) 12: clojure.lang.Var.applyTo(Var.java:463) 13: clojure.core$apply__3243.doInvoke(core.clj:390) 14: clojure.lang.RestFn.invoke(RestFn.java:428) 15: swank.core$eval_from_control__310.invoke(core.clj:62) 16: swank.core$eval_loop__313.invoke(core.clj:67) 17: swank.core$spawn_repl_thread__445$fn__476$fn__478.invoke(core.clj: 173) 18: clojure.lang.AFn.applyToHelper(AFn.java:171) 19: clojure.lang.AFn.applyTo(AFn.java:164) 20: clojure.core$apply__3243.doInvoke(core.clj:390) 21: clojure.lang.RestFn.invoke(RestFn.java:428) 22: swank.core$spawn_repl_thread__445$fn__476.doInvoke(core.clj:170) 23: clojure.lang.RestFn.invoke(RestFn.java:402) 24: clojure.lang.AFn.run(AFn.java:37) 25: java.lang.Thread.run(Unknown Source) I am trying both Clojure Box and Enclojure in NetBeans on Windows XP. Is it a classpath issue? Where should I place the folder that contains code from the book? Please help me out with my variable enviroment settings as well.

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• Metaprogramming - self explanatory code - tutorials, articles, books

  - by elena

  Hello everybody, I am looking into improving my programming skils (actually I try to do my best to suck less each year, as our Jeff Atwood put it), so I was thinking into reading stuff about metaprogramming and self explanatory code. I am looking for something like an idiot's guide to this (free books for download, online resources). Also I want more than your average wiki page and also something language agnostic or preferably with Java examples. Do you know of such resources that will allow to efficiently put all of it into practice (I know experience has a lot to say in all of this but i kind of want to build experience avoiding the flow bad decisions - experience - good decisions)? EDIT: Something of the likes of this example from the Pragmatic Programmer: ...implement a mini-language to control a simple drawing package... The language consists of single-letter commands. Some commands are followed by a single number. For example, the following input would draw a rectangle: P 2 # select pen 2 D # pen down W 2 # draw west 2cm N 1 # then north 1 E 2 # then east 2 S 1 # then back south U # pen up Thank you!

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• Ruby on Rails: How to sanitize a string for SQL when not using find?

  - by williamjones

  I'm trying to sanitize a string that involves user input without having to resort to manually crafting my own possibly buggy regex if possible, however, if that is the only way I would also appreciate if anyone can point me in the right direction to a regex that is unlikely to be missing anything. There are a number of methods in Rails that can allow you to enter in native SQL commands, how do people escape user input for those? The question I'm asking is a broad one, but in my particular case, I'm working with a column in my Postgres database that Rails does not natively understand as far as I know, the tsvector, which holds plain text search information. Rails is able to write and read from it as if it's a string, however, unlike a string, it doesn't seem to be automatically escaping it when I do things like vector= inside the model. For example, when I do model.name='::', where name is a string, it works fine. When I do model.vector='::' it errors out: ActiveRecord::StatementInvalid: PGError: ERROR: syntax error in tsvector: "::" "vectors" = E'::' WHERE "id" = 1 This seems to be a problem caused by lack of escaping of the semicolons, and I can manually set the vector='\:\:' fine. I also had the bright idea, maybe I can just call something like: ActiveRecord::Base.connection.execute "UPDATE medias SET vectors = ? WHERE id = 1", "::" However, this syntax doesn't work, because the raw SQL commands don't have access to find's method of escaping and inputting strings by using the ? mark. This strikes me as the same problem as calling connection.execute with any type of user input, as it all boils down to sanitizing the strings, but I can't seem to find any way to manually call Rails' SQL string sanitization methods. Can anyone provide any advice?

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• fabric deploy problem

  - by alexarsh

  Hi, I'm trying to deploy a django app with fabric and get the following error: Alexs-MacBook:fabric alex$ fab config:instance=peergw deploy -H <ip> - u <username> -p <password> [192.168.2.93] run: cat /etc/issue Traceback (most recent call last): File "build/bdist.macosx-10.6-universal/egg/fabric/main.py", line 419, in main File "/Users/alex/Rabota/server/mx30/scripts/fabric/fab/ commands.py", line 37, in deploy checkup() File "/Users/alex/Rabota/server/mx30/scripts/fabric/fab/ commands.py", line 140, in checkup if not 'Ubuntu' in run('cat /etc/issue'): File "build/bdist.macosx-10.6-universal/egg/fabric/network.py", line 382, in host_prompting_wrapper File "build/bdist.macosx-10.6-universal/egg/fabric/operations.py", line 414, in run File "build/bdist.macosx-10.6-universal/egg/fabric/network.py", line 65, in __getitem__ File "build/bdist.macosx-10.6-universal/egg/fabric/network.py", line 140, in connect File "build/bdist.macosx-10.6-universal/egg/paramiko/client.py", line 149, in load_system_host_keys File "build/bdist.macosx-10.6-universal/egg/paramiko/hostkeys.py", line 154, in load File "build/bdist.macosx-10.6-universal/egg/paramiko/hostkeys.py", line 66, in from_line File "build/bdist.macosx-10.6-universal/egg/paramiko/rsakey.py", line 61, in __init__ paramiko.SSHException: Invalid key Alexs-MacBook:fabric alex$ I can't connect to the server via ssh. What can be my problem? Regards, Arshavski Alexander.

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• Python equivalent of IDL's stop and .reset

  - by Jamie

  Hi there, I'm relatively new to python but have a bit of experience using IDL. I was wondering if anyone knows if there are equivalent commands in python for IDL's stop and .reset commands. If I'm running some IDL script I wrote that I put a stop command in, essentially what it does is stop the script there and give me access to the command line in the middle of the script. So I have access to all the functions and variables that I defined before the stop command, which I find really useful for debugging. The .reset command I find extremely useful too. What it does is reset the the IDL environment (clears all variables, functions, etc.). It's as if I closed that session and opened a new one, but without having to exit and restart IDL. I find that if I'm trying to debug a script I wrote it's useful sometimes to start from scratch and not have to reset IDL (or python now). It would be useful also in python to be able to un-import any modules I had previously imported. Any help with these issues would be greatly appreciated. Cheers Related Python Drop into REPL Is it possible to go into ipython from code?

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• how could installations/configurations be easier in linux?

  - by ajsie

  although you can do anything in linux it tends to require a lot of tweaking in config files and reading a lot of manuals/tutorials before you can have it running in your way. i know that it gets a lot easier by time, and the apt-get installations with ubuntu/debian is heading the right way. but how can linux be more userfriendly for us in the future? i thought that if more is automated like an IDE environment, eg. typing svn will give us all the commands and description about each command when you move between commands with your keyboard. that would be great. but that's just one example. another is the navigation in the terminal between folders. now you have to type a lot just to jump from/to different folders. would be great with some more automatization here too. i know that these extra features will slow down the server, but its 2010 now, and these features are not that heavy for the cpu, but makes it more userfriendly and encourage maintainance of a server, not frighten u off. what do you think about this? should/could we have more user friendly linux environment in servers, something that has annoyed you a lot? a lot of things are done in the unix way, but maybe we should reinvent the wheel in some areas, cause apparently, its so...repeatingly today and difficult to do easy tasks. it should be easier i think..

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• Mercurial Editor: "abort: The system cannot find the file specified"

  - by Killroy

  I have a problem getting Mercurial to recognise my editor. I have a file, c:\windows\notepad.exe and typing "notepad" at the command prompt works. I can commit by using the "-m" argument to supply the commit title. But a simple "hg commit" brings up the error. A call to "hg --traceback commit" brings up: Traceback (most recent call last): File "mercurial\dispatch.pyc", line 47, in _runcatch File "mercurial\dispatch.pyc", line 466, in _dispatch File "mercurial\dispatch.pyc", line 336, in runcommand File "mercurial\dispatch.pyc", line 517, in _runcommand File "mercurial\dispatch.pyc", line 471, in checkargs File "mercurial\dispatch.pyc", line 465, in <lambda> File "mercurial\util.pyc", line 401, in check File "mercurial\commands.pyc", line 708, in commit File "mercurial\cmdutil.pyc", line 1150, in commit File "mercurial\commands.pyc", line 706, in commitfunc File "mercurial\localrepo.pyc", line 836, in commit File "mercurial\cmdutil.pyc", line 1155, in commiteditor File "mercurial\cmdutil.pyc", line 1184, in commitforceeditor File "mercurial\ui.pyc", line 361, in edit File "mercurial\util.pyc", line 383, in system File "subprocess.pyc", line 470, in call File "subprocess.pyc", line 621, in __init__ File "subprocess.pyc", line 830, in _execute_child WindowsError: [Error 2] The system cannot find the file specified abort: The system cannot find the file specified I've tried setting the HGEDITOR environment variable, setting "visual =" and "editor =" in the Mercurial.ini file. I tried full path as well as command only. I also tried copying the notepad.exe file into both the current folder as well as the mercurial folder. Ideally I would like to use the editor at this location "C:\PortableApps\Notepad++Portable\Notepad++Portable.exe", but at this stage I would be happy with any editor!

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• Insert video clip in a lyx presentation and play it in GNU/Linux.

  - by Orjanp

  How can I insert a video clip into a presentation created in Lyx? Have seen http://www.latex-community.org/forum/viewtopic.php?f=19&t=48. It works, but there the video starts in the background in an external player. I would prefer it to be played in the presentation itself. If an external player is used it it should at least start in the foreground. But the presentation takes the foreground. Using evince in GNU/linux as pdf viewer. Beamer is used as a presentation template. Is it possible to play a video file in an embedded player in the presentation itself? Created an example presentation. The code is found below. \documentclass[english]{beamer} \usepackage{mathptmx} \usepackage[T1]{fontenc} \usepackage[latin9]{inputenc} \usepackage{amsmath} \usepackage{amssymb} \makeatletter %%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Textclass specific LaTeX commands. % this default might be overridden by plain title style \newcommand\makebeamertitle{\frame{\maketitle}}% \AtBeginDocument{ \let\origtableofcontents=\tableofcontents \def\tableofcontents{\@ifnextchar[{\origtableofcontents}{\gobbletableofcontents}} \def\gobbletableofcontents#1{\origtableofcontents} } \makeatletter \long\def\lyxframe#1{\@lyxframe#1\@lyxframestop}% \def\@lyxframe{\@ifnextchar<{\@@lyxframe}{\@@lyxframe<*>}}% \def\@@lyxframe<#1>{\@ifnextchar[{\@@@lyxframe<#1>}{\@@@lyxframe<#1>[]}} \def\@@@lyxframe<#1>[{\@ifnextchar<{\@@@@@lyxframe<#1>[}{\@@@@lyxframe<#1>[<*>][}} \def\@@@@@lyxframe<#1>[#2]{\@ifnextchar[{\@@@@lyxframe<#1>[#2]}{\@@@@lyxframe<#1>[#2][]}} \long\def\@@@@lyxframe<#1>[#2][#3]#4\@lyxframestop#5\lyxframeend{% \frame<#1>[#2][#3]{\frametitle{#4}#5}} \makeatother \def\lyxframeend{} % In case there is a superfluous frame end %%%%%%%%%%%%%%%%%%%%%%%%%%%%%% User specified LaTeX commands. \usetheme{Warsaw} \usepackage{hyperref} \makeatother \usepackage{babel} \begin{document} \title{Testing video} \makebeamertitle \lyxframeend{}\section{Testing video} \lyxframeend{}\subsection{Testing video} \lyxframeend{}\lyxframe{Testing video} \href{run:video.wmv}{Movie} \appendix \lyxframeend{} \end{document}

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