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• "Shared Folders" Feature Is Not Working In VirtualBox

  - by Islam Hassan

  I have Ubuntu 11.10 as a host and another linux 2.6 distribution as a guest. When I try to setup guest additions, this error message appears Building the shared folder support module .. fail And because of that, when I run the following in terminal mount -t vboxsf shared /root/shared I get the following error message mount: unknown filesystem type 'vboxsf' Any syggestions please? EDIT Sorry, the mentioned error message isn't complete, this is it. Building the shared folder support module ...fail! (Look at /var/log/vboxadd-install.log to find out what went wrong) This is the content of vboxadd-install.log Uninstalling modules from DKMS Attempting to install using DKMS Creating symlink /var/lib/dkms/vboxguest/4.1.2/source -> /usr/src/vboxguest-4.1.2 DKMS: add Completed. Kernel preparation unnecessary for this kernel. Skipping... Building module: cleaning build area.... make KERNELRELEASE=3.2.6 -C /lib/modules/3.2.6/build M=/var/lib/dkms/vboxguest/4.1.2/build..........................(bad exit status: 2) Error! Bad return status for module build on kernel: 3.2.6 (i686) Consult the make.log in the build directory /var/lib/dkms/vboxguest/4.1.2/build/ for more information. 0 0 ERROR: binary package for vboxguest: 4.1.2 not found Failed to install using DKMS, attempting to install without make KBUILD_VERBOSE=1 -C /lib/modules/3.2.6/build SUBDIRS=/tmp/vbox.0 SRCROOT=/tmp/vbox.0 modules test -e include/generated/autoconf.h -a -e include/config/auto.conf || ( \ echo; \ echo " ERROR: Kernel configuration is invalid."; \ echo " include/generated/autoconf.h or include/config/auto.conf are missing.";\ echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ echo; \ /bin/false) mkdir -p /tmp/vbox.0/.tmp_versions ; rm -f /tmp/vbox.0/.tmp_versions/* WARNING: Symbol version dump /usr/src/linux-source-3.2.6/Module.symvers is missing; modules will have no dependencies and modversions. Actually the log file is very large and it exceeds the 30000 characters limit. How can I upload the entire log file here?

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• I have permanent connections to Canonical servers, what are they for?

  - by Dan Dman

  After the recent upgrade to 12, I notice permanent connections to canonical servers. Running netstat -tp gives: Foreign Address State PID/Program name mulberry.canonical:http CLOSE_WAIT 6537/ubuntu-geoip-p alkes.canonical.co:http CLOSE_WAIT 6667/python alkes.canonical.co:http CLOSE_WAIT 6667/python Why are there permanent connections and how could I stop this behavior? And if this is intentional, who is responsible? I would like to understand why this was done because to me it seems like a bad idea.

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• Ubuntu 12.04 won't load - hangs at Busybox v1.18.5 / initramfs

  - by Marty

  I want to start by saying that I am very new with Linux (about 1 month using it). I have had no problems up until now. I am running Ubuntu 12.04 from a Toshiba laptop with 250 GB hard drive and 3 GB of ram. Everything worked fine yesterday. The only changes I made was was that I downloaded Banshee to try as a replacement for Rhythmbox and did a few recommended updates. This morning I tried to boot and it took a long time and I finally got this error: mount: mounting /dev/disk/by-uuid/02bc41cc-1e21-4700-a179-be2805a658c4 on /root failed: Invalid argument mount: mounting /dev on /root/dev failed: No such file or directory mount: mounting /sys on /root/sys failed: No such file or directory mount: mounting /proc on /root/proc failed: No such file or directory Target filesystem doesn't have requested /sbin/init. No init found. Try passing init= bootarg. BusyBox v1.18. (Ubuntu 1:1.18.5-1ubuntu4) built-in shell (ash) Enter 'help' for a list of built-in commands (initramfs) I'm not sure what to do beyond this point. I have read around on here and haven't found the help I need. I did try to boot it from the Live CD. I can boot up to the Try Ubuntu/Install Ubuntu screen. When I go through the Try Ubuntu selection I can't access my hard disk. When I clicked on it I got this error: Unable to mount 247 GB Filesystem Error mounting: mount: wrong fs type, bad option, bad superblock on /dev/sda/1, missing codepage or helper program, or other error. In some cases useful info is found in syslog - try dmesg|tail or so. I tried dmesg|tail and saw a string of values but nothing that looked helpful. I have also tried to boot from the GRUB screen as recovery mode and previous Linux version but they didn't work either. I tried to load Windows Recovery Environment (loader) (on /dev/sdc3) and got this message: error: no such device: 268057B1805785E9 error: hd1 cannot get C/H/S values I had saw somewhere that I could fix this with the Live CD but my knowledge isn't good enough to try. I tried something with Gpart that I had read, but the system told me that I didn't have Gpart. Could someone please explain to me what I need to do and/or haven't tried yet. Thanks so much!

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• Oracle Database In-Memory: Launch in Frankfurt

  - by Carsten Czarski

  Diesmal gibt es etwas Altes ... und etwas Neues. Zuerst das Neue: Am 11. Juni wird Larry Ellison in Redwood Shores die neue, bahnbrechende Oracle Database In-Memory Funktionalität vorstellen. Mit dieser neuen Technologie profitieren Kunden von beschleunigter Datenbankleistung für Analytics, Data Warehousing, Reporting und Online Transaction Processing (OLTP). Nur 6 Tage später - am 17. Juni -  findet, in Frankfurt, der einzige europäische Launch-Event statt. Neben Fachvorträgen, Panelveranstaltung und Demos wird ein Vortrag von Andy Mendelsohn, Head of Database Product Development, vorgesehen. Melden Sie sich heute noch an. Und hier ist das Alte: Wer erinnert sich noch die die HTML DB ...? In den Archiven der APEX Community Seite haben wir ein Video gefunden, welches zeigt, wie man Seiten in der HTML DB für andere Entwickler sperren konnte. Das gibt es heute übrigens auch noch - es sieht nur etwas anders aus. Viel Spaß beim Ansehen.

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• Cool: Or Hot? Linux really making your coffee, live a linux coffee machine

  <b>Handle With Linux:</b> "Too bad it's only for professional use the HGZ Linux based coffee machine. I'd love to have on of these. A Dream come true. The Linux coffee maker."

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• SQL SERVER Size of Index Table for Each Index Solution 3 Powershell

  Laerte Junior If you are a Powershell user, the name of the Laerte Junior is not a new name. He is the one man with exceptional knowledge of Powershell. He is not only very knowledgeable, but also very kind and eager to those in need. I have been attempting to setup Powershell for many days, [...]...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• SQL SERVER Size of Index Table for Each Index Solution 3 Powershell

  Laerte Junior If you are a Powershell user, the name of the Laerte Junior is not a new name. He is the one man with exceptional knowledge of Powershell. He is not only very knowledgeable, but also very kind and eager to those in need. I have been attempting to setup Powershell for many days, [...]...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Build one to throw away vs Second-system effect

  - by m3th0dman

  One one hand there is an advice that says "Build one to throw away". Only after finishing a software system and seeing the end product we realize what went wrong in the design phase and understand how we should have really done it. On the other hand there is the "second-system effect" which says that the second system of the same kind that is designed is usually worse than the first one; there are many features that did not fit in the first project and were pushed into the second version usually leading to overly complex and overly engineered. Isn't here some contradiction between these principles? What is the correct view over the problems and where is the border between these two? I believe that these "good practices" are were firstly promoted in the seminal book The Mythical Man-Month by Fred Brooks. I know that some of these issues are solved by Agile methodologies, but deep down, the problem is still the principles still stand; for example we would not make important design changes 3 sprints before going live.

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• How do I fix my locale issue?

  - by HackToHell

  I am getting this message everytime I do something like starting or stopping a service. perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: LANGUAGE = "en_US:en", LC_ALL = (unset), LC_MESSAGES = "en_US.UTF-8", LANG = "en_US.UTF-8" are supported and installed on your system. perl: warning: Falling back to the standard locale ("C"). locale: Cannot set LC_CTYPE to default locale: No such file or directory locale: Cannot set LC_MESSAGES to default locale: No such file or directory locale: Cannot set LC_ALL to default locale: No such file or directory (Reading database ... 21173 files and directories currently installed.) Removing bind9 ... * Stopping domain name service... bind9 [ OK ] Processing triggers for man-db ... locale: Cannot set LC_CTYPE to default locale: No such file or directory locale: Cannot set LC_MESSAGES to default locale: No such file or directory locale: Cannot set LC_ALL to default locale: No such file or directory How do I fix this error ?

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• Missing Indexes DMV Report, 3 billion Impact!

  - by Tara Kizer

  We’ve been having some major performance issues with one of the applications that I support.  The database is on SQL Server 2005 and is about 150GB in size.  We’ve identified a couple of issues already on the database side.  The first issue is that some query (or maybe several queries) is getting a bad execution plan at some point in time during the day.  When it occurs, database performance comes to a grinding halt.  We know it’s a bad execution plan as running DBCC FREEPROCCACHE immediately resolves the problem system-wide.  As we have not yet identified the problematic query, we’ve put a temporary solution in place that frees the procedure cache on an hourly basis via a SQL Agent job.  This is not ideal, but it is getting us through the day without a major problem.  We are actively working on identifying the problematic query and hope to disable the SQL Agent job soon. Earlier this week, we had a major slowdown for one of the processes of this application.  I was unable to find any database performance issues, but I continued to investigate it.  One of things that I typically do when investigating database performance issues is run the “Missing Indexes DMV Report” (that’s what I call it at least).  When analyzing the output of that report, I immediately dismiss anything under 1 million “Impact” as I want to target the “low-hanging fruit” initially.  When I ran the report earlier this week, I was shocked to find a suggested index with an impact of over 3 billion! Do I win a prize for the highest impact?  Has anyone seen a value higher than mine?  My exact value was 3154284120.67765. The performance issue from earlier this week ended up being an application problem, but it also brought to light a much needed index.  I had previously seen this index come up in that report but always with a much lower impact.  I had never considered it as the index’s selectivity is very low.  It’s a composite index with three columns.  The first column is not selective, the first two columns are not selective, and the three columns together are not selective.  In fact, no matter how I order it, the index will not be selective at all.  I briefly discussed this with Kimberly Tripp, and she said that this was okay for covering indexes.  Selectivity is irrelevant for a covering index.  She indicated that she’s even created indexes with gender as the first column in the index.  I’ve got lots to learn still!

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• SQL Azure Down - how I got labs.red-gate.com back up

  - by Richard Mitchell

  11:06am - Currently SQL Azure in western europe is down How do I know this? Well on labs.red-gate.com (my Azure website) I have elmah installed which started sending me e-mails about connection failures from 10:40am when trying to get the dynamic content from the database (I was too busy playing with my new Eee Pad transformer to notice immediately). Going to the website confirmed the failure and trying to connect to SQL Azure from SQL Server Management studio and the Management confirmed bad...(read more)

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• apt changelog for to-be installed packages

  - by ithkuil

  GUI update-manager is able to show the "changelog" of packages to-be installed (not downloaded yet). I also found out how to provide the .changelog files in the right place for update-manager to show them, and now I'm happy since I'm able to tell my clients that they can see changelogs of my custom packages directly from their gui. Unfortunately I'm not able to find any command line tool to do the same thing and that would be more useful on servers. From what I saw it seems that this convention (putting .changelog files directly alongside the .deb files in the apt repo) is a ubuntu specific extension. There are some debian resources (the reprepro man page for example) which point on a different way to store changelogs online, http://packages.debian.org/changelogs Does anybody know if there already exists a tool like apt-cache to show the changelogs from packages which are not yet installed (nor downloaded) ?

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• Project development without experience

  - by Raven13

  I'm a web developer who is part of a three-man team that has been tasked with a rather large and complex development project. Other than some direction and impetus from management, we're pretty much on our own to develop the new website. None of us have any project management experience nor do my two coworkers seem like they would be interested in taking on that role, so I feel like it's up to me to implement some kind of structure to the development process in order to avoid issues down the road. My question is: what can I do as a developer without project managment experience to ensure that our project gets developed successfully and avoid the pitfalls of developing a project without a plan?

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• Two BULK INSERT issues I worked around recently

  - by AaronBertrand

  Since I am still afraid of SSIS, and because I am dealing mostly with CSV files and table structures that are relatively simple and require only one of the three letters in the acronym "ETL," I find myself using BULK INSERT a lot. I have been meaning to switch to using CLR, since I am doing a lot of file system querying using xp_cmdshell, but I haven't had the chance to really explore it yet. I know, a lot of you are probably thinking, wow, look at all those bad habits. But for every person thinking...(read more)

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• Something similar to Objective-C categories in other languages?

  - by adig

  I understand Objective-C categories and how they become useful, but I always have a hard time explaining the concept to other programmers that are not familiar with Objective C. Maybe I'm just bad at explaining things, but I was thinking at another way to explain it by comparing to similar features offered by other (more popular) languages. (ex : I can explain the similarities between Objective C protocols and Java Interfaces) Any examples similar to Categories ?

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• wordpress feeds not indexing in webmaster tools

  - by jogesh_p

  I don't have much experience about webmaster tools, i just know the basic of the webmaster, and i am not from SEO background, but i just want to know that: Why my blog's RSS Feeds not indexing from webmaster tools? i want to know about Crawl Stat is this stat is good or bad? To submit the RSS into the webmaster is good for indexing the pages or not?? i also submitted the sitemap. the link of the website is Webtech Eleven

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• How many developers before continuous integration becomes effective for us?

  - by Carnotaurus

  There is an overhead associated with continuous integration, e.g., set up, re-training, awareness activities, stoppage to fix "bugs" that turn out to be data issues, enforced separation of concerns programming styles, etc. At what point does continuous integration pay for itself? EDIT: These were my findings The set-up was CruiseControl.Net with Nant, reading from VSS or TFS. Here are a few reasons for failure, which have nothing to do with the setup: Cost of investigation: The time spent investigating whether a red light is due a genuine logical inconsistency in the code, data quality, or another source such as an infrastructure problem (e.g., a network issue, a timeout reading from source control, third party server is down, etc., etc.) Political costs over infrastructure: I considered performing an "infrastructure" check for each method in the test run. I had no solution to the timeout except to replace the build server. Red tape got in the way and there was no server replacement. Cost of fixing unit tests: A red light due to a data quality issue could be an indicator of a badly written unit test. So, data dependent unit tests were re-written to reduce the likelihood of a red light due to bad data. In many cases, necessary data was inserted into the test environment to be able to accurately run its unit tests. It makes sense to say that by making the data more robust then the test becomes more robust if it is dependent on this data. Of course, this worked well! Cost of coverage, i.e., writing unit tests for already existing code: There was the problem of unit test coverage. There were thousands of methods that had no unit tests. So, a sizeable amount of man days would be needed to create those. As this would be too difficult to provide a business case, it was decided that unit tests would be used for any new public method going forward. Those that did not have a unit test were termed 'potentially infra red'. An intestesting point here is that static methods were a moot point in how it would be possible to uniquely determine how a specific static method had failed. Cost of bespoke releases: Nant scripts only go so far. They are not that useful for, say, CMS dependent builds for EPiServer, CMS, or any UI oriented database deployment. These are the types of issues that occured on the build server for hourly test runs and overnight QA builds. I entertain that these to be unnecessary as a build master can perform these tasks manually at the time of release, esp., with a one man band and a small build. So, single step builds have not justified use of CI in my experience. What about the more complex, multistep builds? These can be a pain to build, especially without a Nant script. So, even having created one, these were no more successful. The costs of fixing the red light issues outweighed the benefits. Eventually, developers lost interest and questioned the validity of the red light. Having given it a fair try, I believe that CI is expensive and there is a lot of working around the edges instead of just getting the job done. It's more cost effective to employ experienced developers who do not make a mess of large projects than introduce and maintain an alarm system. This is the case even if those developers leave. It doesn't matter if a good developer leaves because processes that he follows would ensure that he writes requirement specs, design specs, sticks to the coding guidelines, and comments his code so that it is readable. All this is reviewed. If this is not happening then his team leader is not doing his job, which should be picked up by his manager and so on. For CI to work, it is not enough to just write unit tests, attempt to maintain full coverage, and ensure a working infrastructure for sizable systems. The bottom line: One might question whether fixing as many bugs before release is even desirable from a business prespective. CI involves a lot of work to capture a handful of bugs that the customer could identify in UAT or the company could get paid for fixing as part of a client service agreement when the warranty period expires anyway.

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• Do you write common pre-conditions for a large number of unit test cases ?

  - by Vinoth Kumar

  I have heard/read writing common pre-conditions for a large number of test cases is a bad thing, since this dependency may cause large number of test cases to fail if something changes . What are your thoughts on it ? If this is so , then what exactly is the purpose of setUp() method in Junit that runs before each test case ? If the same code inside setUp() runs before each test case , why cant it run only once before running all the test cases together ?

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• Oracle Enterprise Data Quality: A Leader in Customer Satisfaction

  - by Mala Narasimharajan

  It’s always good to hear feedback from practitioners – the ones who are in the trenches who have experienced both the good and the bad sides of enterprise software. Gartner recently released a report which surveyed 260 data quality professionals from around the world and found that most expressed considerable satisfaction as a whole from their data quality tool vendors. However, a couple of key findings stand out which include, Datanomic (acquired by Oracle), leading the pack in terms of overall customer satisfaction among data quality tools. Read all about it right here http://bit.ly/Ay45SG

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• .htaccess - lose the file .html extension

  - by Darren Sweeney

  I'm having a bad .htaccess day! I want a user to be able to type the URL mysite.com/about instead of mysite.com/about.html On .htaccess file I have: RewriteEngine On RewriteCond %{SCRIPT_FILENAME} !-f RewriteCond %{SCRIPT_FILENAME} !-d RewriteRule ^/(.*)$ /$1.html [NC,L] But this simply does not work? I will add though that if i try this further inside the site e.g. mysite.com/pages/contact Works perfectly whether I have the above code in the .htaccess or not What am I doing wrong?

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• Virtuelle Tour durch das Oracle Universum

  - by A&C Redaktion

  Die neue „Oracle Hardware Virtual Tour“ fürs iPhone und iPad ist eine animierte Entdeckungsreise zu verschiedenen Oracle Produkten: Man öffnet Gehäuse, findet diverse Komponenten, kann diese anschauen, drehen und herausfinden, wozu sie gut sind. Zu sehen und erfahren gibt es unter anderem Oracle Exadata, SPARC Systeme, Sun x86 Systeme, Sun Blade und Sun Netra Systeme. Sie alle treten mit dem Anspruch an, Rekorde in Sachen Performance zu brechen, einfach in der Handhabung zu sein, mit hoher Verfügbarkeit zu punkten und Kosten zu sparen. Ein verspieltes Feature – aber eines, das Partner im Kundenkontakt gewinnbringend einsetzen können. Die 3D-Apps laufen auf dem iPhone 3GS, dem iPad 2 oder neueren Geräten.

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• Virtuelle Tour durch das Oracle Universum

  - by A&C Redaktion

  Die neue „Oracle Hardware Virtual Tour“ fürs iPhone und iPad ist eine animierte Entdeckungsreise zu verschiedenen Oracle Produkten: Man öffnet Gehäuse, findet diverse Komponenten, kann diese anschauen, drehen und herausfinden, wozu sie gut sind. Zu sehen und erfahren gibt es unter anderem Oracle Exadata, SPARC Systeme, Sun x86 Systeme, Sun Blade und Sun Netra Systeme. Sie alle treten mit dem Anspruch an, Rekorde in Sachen Performance zu brechen, einfach in der Handhabung zu sein, mit hoher Verfügbarkeit zu punkten und Kosten zu sparen. Ein verspieltes Feature – aber eines, das Partner im Kundenkontakt gewinnbringend einsetzen können. Die 3D-Apps laufen auf dem iPhone 3GS, dem iPad 2 oder neueren Geräten.

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• Update manager problem

  - by Alberto Favero

  I am trying to update to the LTS 12.04 and got the message: E:MMap dinâmico necessita de mais memória. Por favor aumente o tamanho de APT::Cache-Limit. Valor atual: 25165824. (man 5 apt.conf), E:Um erro ocorreu processando libmail-sender-perl (NovaVersão1), E:Problem with MergeList /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_lucid_universe_binary-i386_Packages, E:As listas de pacotes ou os arquivos de estado não puderam ser analisados ou abertos All updates are stuck now... What I must to do to solve this and upgrade to the 12.04 LTS? Thanks, Alberto

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• I have permanent connections to Canonical servers, what are they for and how can I turn them off?

  - by Dan Dman

  After the recent upgrade to 12, I notice permanent connections to canonical servers. Running netstat -tp gives: Foreign Address State PID/Program name mulberry.canonical:http CLOSE_WAIT 6537/ubuntu-geoip-p alkes.canonical.co:http CLOSE_WAIT 6667/python alkes.canonical.co:http CLOSE_WAIT 6667/python Why are there permanent connections and how could I stop this behavior? And if this is intentional, who is responsible? I would like to understand why this was done because to me it seems like a bad idea.

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• Cannot mount a CIFS network share on Ubuntu over VPN

  - by Aron Rotteveel

  I have setup u VPN connection to our Windows 2008 server at the office and it seems to work fine. For some reason, however, I still am not able to access the network shares over a VPN connection using my standard fstab entries. When I am physically connected to the network, it works fine, but now when trying this over VPN I get the following error: mount error(110): Connection timed out Refer to the mount.cifs(8) manual page (e.g. man mount.cifs) My /etc/fstab looks like this: //server2008/share /mnt/share cifs iocharset=utf8,credentials=/home/aron/.smbcredentials,uid=1000 0 0 As said, it works fine when physically connected, but over VPN it just wont work. Any help is appreciated.

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