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• PXE-boot for Ubuntu 10.04 Desktop version

  - by omkar

  My aim is to Install the Ubuntu 10.04 desktop version on a remote machine using PXE-BOOT. I'm trying to apply the steps given in PXE-BOOT for Ubuntu 9.10 . (I know this is for 9.10). In "Step 8. Setting Up Boot Files", it says cp -a /media/cdrom/install/netboot/* /tftpboot/ but I wasn't able to find the netboot folder in my Ubuntu 10.04 Desktop CD-Rom. Does that folder only exist in Ubuntu Server edition? Is it possible to do this in the Desktop edition?

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• JavaFx a-t-il encore une chance de s'imposer face à Flash, Silverlight et l'émergence du HTML 5 ? Ou

  JavaFx a-t-il encore une chance de s'imposer Face à Flash, Silverlight et l'émergence du HTML 5 ? JavaFx a été lancé il y a trois ans pour développer des applications lourdes. Très vite, les développeurs l'ont utilisé pour des applications multimédias et pour faire du web java (notamment des Rich Internet Applications ou RIA). La plateforme - qui se compose du langage de script JavaFX, une plateforme pour client lourd et une intégration avec la machine virtuelle Java - entendait ainsi répondre ainsi aux besoins d'un marché où la compétition fait désormais rage avec, entre autres, des acteurs aussi importants que Flash de Adobe et Silverlight de Microsoft. Selon la

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• Anti aliasing problem

  - by byronyasgur

  I am auditioning fonts on google web fonts and one that I was discounting was Ubuntu because it looked a bit jagged ( screenshot below taken straight from google); however afterward I read an article where it was mentioned as a good choice, and there was a screenshot where it looked really good ( to me anyway ). I am using windows 7 and have tried looking at it in chrome and firefox. I notice the same thing with some other fonts but this one is a good example because it looks perfect in the screenshot but not so good when I look at it on their site. I know this essentially is a question about setting my computer, but I thought that this would be the best place to pose the question: Is there something wrong with the settings on my machine seeing as it's obviously not showing the font the same on my computer as it did when the article writer downloaded it and used it in an image. The screenshot from Google ... The screenshot from the article above ...

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• How to prevent WLAN connection from dropping permanently?

  - by Chris

  I have a desktop with a Fritz USB WLAN N stick and tried Ubuntu 12.04. Installation went fine and WLAN is working. However, connection drops permanent. Reconnecting manually fixes it but after a few minutes it drops again. It's connected to a Vodafone 802 box with WLAN N fix set. It seems that it works when I switch off N mode. But I need to test. Can someone confirm this issue or is there another solution? I have another machine with 12.04 (HP 625 laptop) running where connection is stable.

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• Numbers on the launcher

  - by pete of ebor

  Using 12.04 LTS - few days ago, I left my machine on while I went out. On my return, the launcher was showing (it is set to be hidden) and there were small numbers 1-9 on the icons and letters s on the bottom-most icon and t on the rubbish bin. System still worked fine, although the launcher remained visible, and would not hide. After about 20 mins work, they suddenly vanished and the launcher hid itself.. is this a normal action ? It hasn't happened since..

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• Confusion installing mongodb manually because of sitting behing a proxy

  - by black sensei

  I am forced to install mongodb manually on an Ubuntu server because the machine sits behind a proxy and there is no way to temporary open port 11371 for key exchange to happen. I am following this official mongoDB tutorial. So I downloaded the tgz and extracted it in /usr/local/bin/mongodb. Where I got confused is when assigning the ownership of the /data/db to the user mongo. So who creates the user mongo? How to get control-scripts working?

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• How to use PostgreSQL on AWS - Ubuntu 11.10

  - by That1Guy

  I'm extremely new to cloud-computing, Linux, and PostgreSQL, so if this is a stupid question, I apologize. I've managed to create an m1.large instance running Ubuntu 11.10, connect via Putty SSH, and install PostgreSQL (sudo apt-get install postgresql), but that is as far as I've gotten. My goal is to run several python web-scraping scripts that I've written on this instance (so as not to eat up all of our bandwidth (smaller company at the moment)) and insert the scraped data into a PostgreSQL table on the instance and later retrieve that data to store on our local server (as I've heard AWS EBS is unreliable and I don't want to take chances). How can I configure PostgreSQL on my AWS instance? How can I access the data from my machine? I currently use PgAdmin3 to manage PosgreSQL on our local server. Can I use this same interface to manage PostgreSQL on my AWS instance? Any suggestions, solutions, links, etc is greatly appreciated. And again, if this is a dumb question, I apologize.

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• How can I increase the maximum number of simultaneous users to log in to a server?

  - by nixnotwin

  I use ubuntu server 10.04 on a fairly good machine, with 2.40 dual-core processor and 2GB RAM. My users login with ssh or samba. I have setup LDAP with PAM to sync user accounts between unix and samba. When I allowed about 90 users to login over ssh at once the server refused login for many users. I am using dropbear as ssh server. Even samba logins failed for many users. I need to allow at least 100 users to login at once. Is there anyway to do this?

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• Copying an SSH Public Key to a Server

  - by Nathan Arthur

  I'm attempting to setup a git repository on my Dreamhost web server by following the "Setup: For the Impatient" instructions here. I'm having difficulty setting up public key access to the server. After successfully creating my public key, I ran the following command: cat ~/.ssh/[MY KEY].pub | ssh [USER]@[MACHINE] "mkdir ~/.ssh; cat >> ~/.ssh/authorized_keys" ...replacing the appropriate placeholders with the correct values. Everything seemed to go through fine. The server asked for my password, and, as far as I can tell, executed the command. There is indeed a ~/.ssh/authorized_keys file on the server. The problem: When I try to SSH into the server, it still asks for my password. My understanding is that it shouldn't be asking for my password anymore. What am I missing?

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• Skype no sound on Kubuntu 13.10

  - by Michael Aquilina

  I just performed a fresh install of Kubuntu 13.10 on my machine. Everything is working great except for Skype. I cannot get any form of audio playback in Skype. In the sound settings panel I get a bunch of different sound sources, none of which work! At the moment I have set it to "sysdefault (unknown)" I installed it using the deb package found on the official website. My phonon backend is using phonon-gstreamer. When running skype from the terminal I get the following error messages: ALSA lib control.c:953:(snd_ctl_open_noupdate) Invalid CTL plughw:CARD=PCH ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave Is this a known problem or has anyone experienced the problem and managed to solve it?

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• does not boot after install, my troubleshooting and google fu have failed me

  - by chris

  I can only get an install to "stick" if I use shred to zerofill my drive first. Otherwise, when I install ubuntu or lubuntu 12.04, I will get "grub rescue: out of disk". With the aforementioned (completely default) install on top of a zerofilled drive, then rebooting after installing updates will tell me there is no operating system. I don't even get to grub. Installing on top of the failed install, while choosing "erase ubuntu 12.04 and reinstall", I get the grub rescue: out of disk error. The hard drive has been repeatedly tested and does not have any read or write errors. I've used check disk for errors on the pen drive I'm installing from and it comes up clean as well. The system is an inspiron 6000, with 1gb ram and a 250 gb hard drive. I'm typing this from a live cd on the same machine. What gives?

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• Why do HDFS clusters have only a single NameNode?

  - by grautur

  I'm trying to understand better how Hadoop works, and I'm reading The NameNode is a Single Point of Failure for the HDFS Cluster. HDFS is not currently a High Availability system. When the NameNode goes down, the file system goes offline. There is an optional SecondaryNameNode that can be hosted on a separate machine. It only creates checkpoints of the namespace by merging the edits file into the fsimage file and does not provide any real redundancy. Hadoop 0.21+ has a BackupNameNode that is part of a plan to have an HA name service, but it needs active contributions from the people who want it (i.e. you) to make it Highly Available. from http://wiki.apache.org/hadoop/NameNode So why is the NameNode a single point of failure? What is bad or difficult about having a complete duplicate of the NameNode running as well?

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• Where does node.js install to?

  - by Ash Scott

  I'm trying to install a script, which is a clone of a game, and uses node.js for it. Now, the documentation says I should copy the node.exe (windows) and put it where the clone is. Now, I can't find the node.exe ubuntu equivalent, I can't even find where it's installed?! Don't really want this hosted on a windows machine due to licensing. Here's a snipet from the doc: Download : Node.js (Install Button) Go where you are install Node.js (For Windows 8 it's C:/Programms/nodejs) Copy node.exe and paste on the clone folder Now I need to do this in ubuntu, however I can't find where node is installed to? Any ideas?

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• Random freezes on MBP9,2 + Ubuntu 12.04

  - by EnToutCas

  I have a MBP9,2 (mid-2012) at work. I put Ubuntu 12.04 on it after some efforts. Everything works more or less now, except I get random freezing every now and then. I have to power off the machine to restore it. Wondering if anyone had the similar issue. My setup: MacBook Pro 9,2 (mid 2012) Ubuntu 12.04 (installed using the special image for Macs) No proprietary drivers xmonad on Unity 2D So far the freezes look to be sporadic and spontaneous.

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• Why do I get the message "program not found" when running "mal" for Latex

  - by maclin

  just started using Ubuntu (11.10 oneiric). It is running on a virtual machine. I used to use SuSE. However, SuSE is now with Novel, which goes hand in hand with Microsoft. So now shifted to Ubuntu. For documentation I use LaTeX and installed a package. This package uses a pre-processer (it is called "mal"). I ran the textconfig rehash command as required, but when I try to run the program, I get a "program not found" error. I am guessing that it is not in my path. (a sudo did not help) Any idea?

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• wkhtmltopdf displaying text as blocks

  - by making3

  We're using wkhtmltopdf in a web project (nodejs/compoundjs). We've gotten it working how we wanted on our machines (using the --use-xserver switch). However, when I try to run this on our Ubuntu server 12.04 (without the ubuntu-desktop package), the PDF cannot use the switch. When we disable the switch, the PDF displays any characters as blocks (image below). How do I resolve this without installing ubuntu-desktop and running x server? I've found liberation fonts, which installing ttf-liberation and fonts-liberation did not help. And urw-fonts, but I have yet to find an Ubuntu equivalent. EDIT: It just hit me, this doesn't matter if I'm on the server or not. On my development machine (Ubuntu 13.04 desktop), I can run the following, which produces the same blocks: wkhtmltopdf http://google.com google1.pdf While this prints out the pdf properly: wkhtmltopdf --use-xserver http://google.com google2.pdf My version of wkhtmltopdf is 0.12.0.

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• INVITATION: Formez-vous sur la solution Oracle Database Appliance !

  - by mseika

  Formez-vous sur la solution Oracle Database Appliance ! Cher partenaire, Arrow a le plaisir de vous inviter au bootcamp ODA - Oracle Database Appliance - qui aura le 30 octobre prochain à Colombes, dans les locaux d’Oracle France. Venez découvrir comment conquérir de nouveaux marchés grâce à lanouvelle appliance base de données Oracle! Arrow vous propose une demi-journée pour comprendre ODA et démontrer les bénéfices de cette solution accessible à tous. Au programme de cet après-midi de formation : une démonstration réalisée en temps réel sur la machine Arrow, déplacée pour l’occasion et de multiples échanges avec notre spécialiste ODA , Stéphane KIDJO, Consultant Avant-Vente chez Arrow. AGENDA : 14h00 - Accueil-café14h20 – Lancement de la démonstration :• Présentation et installation de l’appliance• Présentation de la solution : positionnement marché, bénéfices• Proposition de valeur• Une solution tarifaire attractive 16h00 - De nouvelles opportunités pour vendre Oracle 11g R2 et ses options 16h30 – Désinstallation de l’appliance 16h45 – Questions & Réponses 17h00 – Echanges autour d’un goûter Ce workshop est gratuit. Pré-inscription obligatoire. Nombre de places limité.

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• Ubuntu 13.10 alongside Windows 7 - Mission Impossible?

  - by Przemek Jedlikowski

  I just want to install Ubuntu 13.10 alongside Windows 7 HP on my EeePC 1215N. I can't do it when Windows 7 is booted up (wubi.exe hasn't got that option), so I booted it from USB key. Everything's loaded, I double-click Install Ubuntu. I click 'Next ', then I choose that I want to install Ubuntu alongside Windows 7. And the machine restarts. Not resets. Restarts. X server's killed immediately, I can see the console only. What do I have to do now?

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• How can I run Tellme more software on Ubuntu 14.04 LTS?

  - by Alex Walker

  I'm new to Ubuntu and I've been loving it so far, I have it on my 2 computers and I think everyone should try it. I run an English Laboratory in a University (Our PC's are old and slow) so I want to install Ubuntu on all of them so the students can have a better experience here, the problem is tha we NEED Tell me more Software which I believe it's only for windiws. How can I install it in ubuntu? do I need wine or a virtual machine with Windows? please help! and thank you so much!!

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• Tweaks to allows maximum number of users to login to ubuntu server.

  - by nixnotwin

  I use ubuntu server 10.04 on a fairly good machine, with 2.40 duel-core processor and 2GB RAM. My users login with ssh or samba. I have setup LDAP with PAM to sync user accounts between unix and samba. When I allowed about 90 users to login over ssh at once the server refused login for many users. I am using dropbear as ssh server. Even samba logins failed for many users. I need to allow at least 100 users to login at once. Is there anyway to do this?

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• How can I connect to a Windows (7) running in VirtualBox from the network with RDP?

  - by Andre

  I have a Windows7 guest running in a VirtualBox hosted by Precise (Ubuntu 12.04 LTS). In the settings of the virtual machine I have activated the 'Remote Display' (Enable Server) with default settings (server port, authentication method). The network of the guest is attached to NAT. I try to use Remmina to connect from the host to the guest. I tried 127.0.0.1, 127.0.0.2, the internal IP of Win7 (10. ...). Did not work so far. Do I have to active something and what on Win7 (home premium)? I would like to connect to the Win7 remote desktop from the local network. Can I stay in NAT mode (preferred due to our network policy), or do I have to go for 'bridged'? Thanks!

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• Using Ubuntu with a dial-up connection

  - by Robert Heller

  Is it possible to install Ubuntu on a machine with only a dial-up connection? That is, does the Ubuntu install CD come with everything needed to set up an Internet connection using a dial-up modem (I have a USRobotics Courier V.Everything connected to a RS232 port on a Lava Quattro-PCI). I presently run CentOS (5.9), which does include support for dialup Internet access out-of-the-box (all of the modules for dialup are on the distro DVD). When I ran the UBuntu CD (12.04.1 desktop), there was no sign of dial-up Internet support. Am I faced with a chicken or egg problem?

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• How do I safely use a virus infected USB drive in Ubuntu?

  - by suhridk

  I have an USB drive which I know is virus infected (an anti-virus on my friend's machine detected it). Unfortunately neither of us know the virus name and I don't want to take the risk of plugging it to my Windows box again. Of course, in all probability the virus affects only Windows. (But I'm not sure) I want to know if I can safely plug the USB into my Ubuntu Lucid laptop and copy the stuff I need from the drive. If there are some precautions I need to follow what would they be?

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• How can I run samba?

  - by depesz

  I have server running Ubuntu 10.10. Never used samba before, as I never had windows machines, but now I need it. So I did: apt-get install samba smbfs smbclient. Packages are installed, but I have no idea how to configure it. All howtos I found on the net relate to /etc/samba/something.conf, where I don't even have /etc/samba directory. The only config I found is /etc/default/samba, which contains (aside from comments) only: RUN_MODE="daemons" All I want is to be able to have access to some directories on the Ubuntu machine from Windows, nothing else.

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• How do I install xulrunner in 12.04?

  - by chessplayer

  I am trying to migrate a virtual machine I use for my classes at the university from 10.04 to 12.04 and in that I am using xulrunner so that first, I can have SQLiteManager as a stand alone app next, KNIME can provide help for its nodes I tried adding the the mozilla ppa as described in some posts, e.g. here or here, but when I search for xulrunner in Synaptic I get no match. I read in this link, that xulrunner was left out intentionally, which, frankly, I think is a bad decision! Anyway, does anyone know a way out of this, i.e. how to get xulrunner for 12.04? Any help appreciated!

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