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• Locate a user's bashrc file

  - by Starkers

  Really confused. Upon running cat etc/passwd I have found this: postgres:x:117:126:PostgreSQL administrator,,,:/var/lib/postgresql:/bin/bash meaning I have a postgres user, right? I want to change the bashrc environment file of this user to make commands available to it. /var/lib/postgresql doesn't contain a bashrc file, and /bin/bash doesn't contain it either, so I don't really know what's going on. All I know is a created postgres using the useradd command, so why do I have some weird user with no home directory? So confused :(

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• Unable to install 12.10 on asus r500v

  - by bmdr38

  I have been unable to get beyond the grub boot screen of the live dvd/usb. The Try Ubuntu without installing, Install Ubuntu, etc menu shows, and I have tried adding/replacing nomodeset and no splash with neither helping. Even "Check disc for defects" does not display anything when selected. I am at a complete loss as to how to fix this one. I have had many successful installs in the past, but this is definitely a first for me. Just as FYI, Gfx card: Geforce GT 635M I realize this particular card has Optimus on it, however even the alternative boot/command line install fails to load. Any help would be appreciated. I realize there have been multiple threads on this, but none of the methods within them have solved this yet. Thanks

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• Why didn't virtual ubuntu halts clearly?

  - by Dims

  I am running Ubuntu 11.10 on Oracle Virtual Box 4.2.4 under Windows 7 x64. To stop guest system I often use halt command which works fine on physical machines. But it looks hanging on virtual ubunty. After halt it starts shutting down, Ubuntu logo appears with dots below flashing. After some cycles it just stops. VM manager does not feel machine is gone, so I need to power off it. P.S. The system stops Ok if I shutdown it via GUI.

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• Auto completion (using the Tab key) on the new Ubuntu 11.10

  - by Shubhroe

  Earlier, when I used tab to auto-complete filenames (using the tab key) and if the filenames contained blank spaces or certain special characters, the name would be listed with backslashes '\' thrown in so that it could work with a preceding command like ls or rm. eg. Earlier if I had a file name called "The Four Seasons- Spring - Allegro.mp3" and this was the only file name starting with "The", when I typed "rm The" and Tab, it would complete itself to "rm The\ Four\ Seasons-\ Spring\ -\ Allegro.mp3" and I could subsequently press Enter and remove the file. However, lately what happens when I press Tab is the following: "rm The Four Seasons- Spring - Allegro.mp3" and if I now press Enter, it returns a bunch of errors because it thinks I want to remove a bunch of files (named The, Four, etc.). Does anyone else encounter the same problems and if yes, is there a good way to resolve this problem? Thanks!

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• How do you unit test your javascript.

  - by Erin

  I spend a lot of time working in javascript of late. I have not found a way that seems to work well for testing javascript. This in the past hasn't been a problem for me since most of the websites I worked on had very little javascript in them. I now have a new website that makes extensive use of jQuery I would like to build unit tests for most of the system. My problems are this. Most of the functions make changes to the DOM in some way. Most of the functions request data from the web server as well and require a session on the service to get results back. I would like to run the test from either a command line or a test running harness rather then in a browser. Any help or articles I should be reading would be helpful.

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• Xubuntu Mail Watcher (XFCE Plugin) Won't Connect To IMAP

  - by Xophmeister

  I am trying to get the XFCE Mail Watcher panel plugin to check my IMAP mail, but it won't connect to my server. I have entered the details correctly -- they're exactly the same as those I use in Thunderbird -- but nothing! When I go to select the "New mail folders..." it returns with "Failed to get folder list". If I change my username from name@domain to name, I still get this error, but it takes a few seconds longer to appear. Nothing shows up in the log. If it makes a difference, my mail is hosted by Microsoft, in some way. Like I say, I can access it through Thurderbird using the IMAP credentials; but I have the Exchange 2010 web app, if I use webmail. Could this be the problem? (Thunderbird often complains with "Command Error. 12" with what it gets back from the server, but carries on regardless.)

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• Why is Thunderbird pegging a core at 100%?

  - by david6

  I have experienced 2-3 unexplained lockup over last 10 days. Today, I had a random lockup (no mouse, keyboard response, 100% CPU). But, when I finally switched (Ctrl-Alt-F1) to command line (it took several minutes) it told me that thunderbird-bin had locked a CPU. I ran this to resolve: pidof thunderbird-bin sudo kill #### However, after saving other work, I tried restarting Thunderbird. It went to 90%+ CPU, and within 20 seconds it locked again. Once I have more detail I will raise a bug (on Ubuntu Forums). Does anyone have any other suggestions, advice? UPDATE Thunderbird 13.0.1 is quite stable in safe mode. Still working to resolve ..

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• plotting histograms in ROOT with varying variable names

  - by user66890

  I am not sure how to phrase this question correctly, but this is what I am trying to do. A single histogram can be plotted using cern ROOT with a following command, (TH1F*)electron->Draw(); But I have tens of histograms named in a sequence, such as electron1, elecron2, electron3, etc, and I want to write a simple loop to plot them all. I tried using sprintf and a simple for loop, but ROOT doesn't like it. char name[20]; (TH1F*)electron->Draw(); for(int j=0;j<5;j++){ sprintf(name, "%s%d","electron",j); (TH1F*)name->Draw("same"); } What am I doing wrong? Thanks in advance.

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• Setting TeX Live path for root

  - by N.N.

  I have installed TeX Live 2011 vanilla and I have trouble setting the TeX Live path for root (in Ubuntu 11.10). The problem is that when I run sudo tlmgr I get: sudo: tlmgr: command not found To fix the path for non-root it was sufficient to add PATH=/usr/local/texlive/2011/bin/x86_64-linux:$PATH to /etc/profile. I have tried adding this same line to /root/.bashrc and I have also tried to add it to /etc/profile.d/zzz-texlive.sh like Herbert suggest in http://tex.stackexchange.com/questions/26624/tlmgr-inaccessible/26626#26626 but it does not help.

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• How To Uninstall Your Windows Product Key Before You Sell Your PC

  - by Taylor Gibb

  Do you have an old PC you want to sell, but also want to use your Windows license on your new PC ? There is a hidden command in Windows that allows you to do just that. Read on to find out more. Note: Between Microsoft and your OEM there are a number of different laws that determine whether you are allowed to use your license on another PC, so follow this tutorial at your own risk. Additionally before you go through the tutorial you will want to check that your product key is still attached to your PC/Installation CD, if it is not , do a quick Google search on how to recover it. 6 Ways Windows 8 Is More Secure Than Windows 7 HTG Explains: Why It’s Good That Your Computer’s RAM Is Full 10 Awesome Improvements For Desktop Users in Windows 8

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• delete /var/cache/* How can I fix it?

  - by user110474

  I accidentally remove all files in /var/cache/ directory with sudo rm -rf command. Now I can not see the files in Trash to bring them back. I would like to know how bad is the situation if these files are removed? does ubuntu going to work normally and recreate the directories in cache again automatically? If not, which directories do I have to create in /var/cache/ manually to let everything work fine? I have already manually made apt and apache2 and debconf in cache directoy but I do not know if I miss more importand directory which needed to be created there. I hope somebody can guide me to fix this issue.

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• Setting APPMENU_DISPLAY_BOTH for gnome applications does not work on Ubuntu 12.04 LTS

  - by Jack'

  To start the application with the menu enabled in the application and the panel, the following command has to be used: APPMENU_DISPLAY_BOTH=1 appname I recently discovered that this only works for non-gnome applications on Ubuntu 12.04 LTS, i.e. if you replace appname with applications such as gnome-terminal, gedit, evince, empathy, evolution, rhythmbox, nautilus, etc. only global menus will be displayed. However, if you start, for example, gimp or inkscape by using APPMENU_DISPLAY_BOTH, both global and local menus will be shown. The questions is: why is APPMENU_DISPLAY_BOTH not taken into account when starting such gnome applications? P.S. I know how to disable global menus in order to get the local ones (UBUNTU_MENUPROXY trick, removing appmenu-gtk/qt packages, removing the indicator-appmenu, etc.) Thanks for the help!

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• Load balancing on Ubuntu Server

  - by SabreWolfy

  I have Ubuntu 10.04.4 server (32-bit) installed on a headless quad-core machine with 2GB RAM. I'm running a command-line analysis which is analyzing a large amount of data, but which does not require a large amount of RAM. The tool does not provide any multi-threading, so the CPU load is sitting at 1.00 (or sometimes just a little over). I ran top and pressed 1 to see the load on each of the cores and noticed that "Cpu1" is always running at 100%. I thought that the load would be distributed between the cores, rather than loading one core all the time. I'm sure I've seen this load-balancing behaviour before in Ubuntu or Debian Desktop versions. Why would the Server edition work differently? The analysis will likely take several hours to run, so loading one core at 100% for many hours while the other 3 remain idle is surely not the best approach?

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• Keyboard freezes when xorg crashes

  - by gsedej

  Situation is like that. Many times has happened that Xorg freezes and with it also keyboard. Quite some times because of some Compiz effects or Flash (fullscreen switch). Keyboard becomes totaly unresponsive, while mouse still works (I can move cursor, but can't click since desktop freezes) and music still plays and I can connect trough ssh. This is the only way I know I can try to solve problem - either by killing browser&flash or lastly restarting xorg server. This problem appears on more than one Ubuntu computer. My home dekstop with proprietery nvidia driver, on my work where I use noveau driever (opensource driver for geforce) and sometimes (but rarely) also on laptop with ATI graphics (using r300g driver which is really good!). Can someone explains why mouse still works while I can't input from keyboard? (I can't switch to virtual console or do R-E-I-S-U-B command) I have USB keyboard and USB mouse.

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• What skills does a web developer need to have/learn?

  - by Victor

  I've been I've asked around, and here's what I gathered so far in no particular order: Knowledge Web server management (IIS, Apache, etc.) Shell scripting Security (E.g. ethical hacking knowledge?) Regular Expression HTML and CSS HTTP Web programming language (PHP, Ruby, etc.) SQL (command based, not GUI, since most server environment uses terminal only) Javascript and library (jQuery) Versioning (SVN, Git) Unit and functional test Tools Build tools (Ant, NAnt, Maven) Debugging tools (Firebug, Fiddler) Mastering the above makes you a good web developer. Any comments?

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• Tab Sweep: Dynamic JSF Forms, GlassFish on VPS, Upgrading to 3.1.2, Automated Deployment Script, ...

  - by arungupta

  Recent Tips and News on Java, Java EE 6, GlassFish & more : • Dynamic forms, JSF world was long waiting for (Oleg Varaksin) • Creating a Deployment Pipeline with Jenkins, Nexus, Ant and Glassfish (Rob Terp) • Installing Java EE 6 SDK with Glassfish included on a VPS without GUI (jvm host) • GlassFish multimode Command for Batch Processing (javahowto) • Servlet Configuration in Servlet 3.0 api (Nikos Lianeris) • Creating a Simple Java Message Service (JMS) Producer with NetBeans and GlassFish (Oracle Learning Library) • GlassFish 3.1 to JBoss AS 7.1.1 EJB Invocation (java howto) • Tests In Java Ee For Zero-error Applications (Dylan Rodriguez) • Upgrading GlassFish 3.1.1 to 3.1.2 on Oracle Linux 6.2 64-bit (Matthias Hoys) • Migrating an Automated Deployment Script from Glassfish v2 to Glassfish v3 (Rob Terp) • Installer updates, Glassfish, Confluence and more…! (Rimu Hosting)

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• git in non-distributed, independent, lone programming ...best practice(s) ?

  - by explorest

  I am currently studying the git documentation to get a hang of distributed version control workflow and use of git command line. I want to first start using git with small, personal, pet projects so to gain experience before doing it on large scale (i.e., bigger projects, team dev). What areas of the git system should I, as a lone player, devote most of my study time to... what parts should I leave for the larger scale work later on. In other words what features of the git system will fully be grasped in team work only, and therefore should not be too involved with at an individual level?

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• AppFabric &ndash; where are all the monitoring events?

  - by Shawn Cicoria

  When you’ve just gone through a setup of AppFabric and you’ve got some WF/WCF things happening, if you start looking at the Dashboard and you see nothing, it might be as simple as restarting SQL Agent. I generally don’t reboot my system for several days and after installing AppFabric the SQL Agent jobs didn’t start firing right away.  Yes, even running a boot to VHD, you can still put the machine to sleep (just logoff and click on Sleep)… So, after spending time looking through the SQL monitoring DB that AppFabric was configured to use, I saw a bunch of records in the [AppFabric_Monitoring].[dbo].[ASStagingTable] table.  This table is the stopping point before the SQL Agent job (or Service Broker in SQL Express) pushes the items to their final resting place. This post goes through a few things to check on AppFabric monitoring http://social.technet.microsoft.com/wiki/contents/articles/appfabric-items-to-check-when-configuring-appfabric-monitoring.aspx Of course, during development you might want to clean up regularly For that there’s the PowerShell command Clear-AsMonitoringSqlDatabase -Database AppFabric_Monitoring

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• ALSA mixer applet?

  - by David Given

  I have recently installed Narwhal. Everything seems to look good so far, but as usual sound via PulseAudio is deeply unsatisfactory; scratchy sound from Skype, choppy sound from command line apps, etc. So I've removed it, and sound now works fine. Unfortunately I now discover that the standard Gnome mixer applet has changed to being PulseAudio-only, and trying to run it just hangs waiting for a PulseAudio connection. Does anyone know of a replacement volume control applet that I could use which manipulates the ALSA mixer directly? I've found xfce4-volumed, which handles the hotkeys very nicely (once I disable the keyboard shortcuts in Gnome), but of course the XFCE4 mixer applet isn't compatible with Gnome so I can't use that; and there appears to be nothing else readily apparent...

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• How to get the correct battery status?

  - by GUI Junkie

  At this moment, ever since I installed Ubuntu on this machine, the battery status says: not present. Looking at this answer, however, I find that /proc/acpi/battery/BAT1/info (sometimes its /proc/acpi/battery/BAT0/info, use tab complete to help) has the following info: present: yes design capacity: 4400 mAh last full capacity: 4400 mAh battery technology: rechargeable design voltage: 11100 mV design capacity warning: 300 mAh design capacity low: 132 mAh cycle count: 0 capacity granularity 1: 32 mAh capacity granularity 2: 32 mAh model number: BAT1 serial number: 11 battery type: 11 OEM info: 11 In accordance to this answer, I've checked the /proc/acpi/battery/BAT1/state file: present: yes capacity state: ok charging state: charged present rate: unknown remaining capacity: unknown present voltage: 10000 mV The acpi -b command returns: Battery 0: Unknown, 0%, rate information unavailable Any suggestions on getting the battery info updated?

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• Keyboard and touchpad do not work

  - by user289219

  I have an Lenovo IdeaPad S210 Touch and I want to install Ubuntu on it. The problem is that when I try booting the system from a USB drive (starting the so-called Live session) to try to see if the system works on my computer, the system will turn on and everything will work properly except for the keyboard and the touchpad. Neither of them are listed when using this command: xinput --list. I cannot get my laptop keyboard/touchpad to work, but USB keyboards and mice will work and my laptop's touchscreen will also work.

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• Why won't apt-get install anything after I deleted its cached lists?

  - by Gernot

  Recently I had a problem with the update-manager and search for a solution. On my search I found a post, where someone had the same problem and as solution they told him he should run this command on the terminal: sudo rm /var/lib/apt/lists/* I also run this, and the update-manager worked again. But now, I noticed that apt-get won't install anything. I wanted to install rvm (for ruby) and therefore I needed a few packages (build-essential and curl to be precise). But if I tried to install them, I always get the message that there is no installcandidate for that package... . What can I do to get apt-get working again?

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• Problem with WindowsXp on VirtualBox in 12.10

  - by umpirsky

  When I try to start it I get: Failed to open a session for the virtual machine WindowsXp. The virtual machine 'WindowsXp' has terminated unexpectedly during startup with exit code 1. Result Code: NS_ERROR_FAILURE (0x80004005) Component: Machine Interface: IMachine {5eaa9319-62fc-4b0a-843c-0cb1940f8a91} and in another dialog: Kernel driver not installed (rc=-1908) The VirtualBox Linux kernel driver (vboxdrv) is either not loaded or there is a permission problem with /dev/vboxdrv. Please reinstall the kernel module by executing '/etc/init.d/vboxdrv setup' as root. If it is available in your distribution, you should install the DKMS package first. This package keeps track of Linux kernel changes and recompiles the vboxdrv kernel module if necessary. When I try to run: $ sudo /etc/init.d/vboxdrv setup [sudo] password for umpirsky: sudo: /etc/init.d/vboxdrv: command not found Any idea?

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• How do you accept arguments in the main.cpp file and reference another file?

  - by Jason H.

  I have a basic understanding of programming and I currently learning C++. I'm in the beginning phases of building my own CLI program for ubuntu. However, I have hit a few snags and I was wondering if I could get some clarification. The program I am working on is called "sat" and will be available via command line only. I have the main.cpp. However, my real question is more of a "best practices" for programming/organization. When my program "sat" is invoked I want it to take additional arguments. Here is an example: > sat task subtask I'm not sure if the task should be in its own task.cpp file for better organization or if it should be a function in the main.cpp? If the task should be in its own file how do you accept arguments in the main.cpp file and reference the other file? Any thoughts on which method is preferred and reference material to backup the reasoning?

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• 14.04 Chinese Ibus Input - No Options

  - by RhZ

  getting my new 14.04 rig going ;-) Pretty happy with it, everything seems to be working great. For Chinese input, however, having a problem. I went through the typical steps, open language in settings, let it install some stuff, then add Chinese and choose Ibus. Then, after logging in and out, I see the language icon in my system tray. However, when I go to add the Chinese into Ibus, it only lets me choose "Chinese", which isn't an input method. It should give me a bunch of choices like pinyin, bopomo or whatever, I only use pinyin so don't know those names. I saw someone online had a little command which helped people with similar problems, but it did not work for me, even after a re-start. So, anyone got a solution? Edit: Here is what it looks like, just "Chinese" in the list, when there should be a bunch of input options like pinyin, potomofo, and so on.

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