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• How to debug a server that crashes once in a few days?

  - by Nir

  One of my servers crashes once in a few days. It does low traffic static web serving + low trafic dynamic web serving (PHP, local MYSQL with small data, APC, MEMCACHE) + some background jobs like XML file processing. The only clue I have is that a few hours before the server dies it starts swapping (see screenshot http://awesomescreenshot.com/075xmd24 ) The server has a lot of free memory. Server details: Ubuntu 11.10 oneiric i386 scalarizr (0.7.185) python 2.7.2, chef 0.10.8, mysql 5.1.58, apache 2.2.20, php 5.3.6, memcached 1.4.7 Amazon EC2 (us-west-1) How can I detect the reason for the server crashes ? When it crashes its no longer accessible from the outside world.

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• Does Unity support disabling the global application menu?

  - by Michael E

  I'm fairly excited for Unity, as it looks like a promising new direction for Ubuntu. However, I do have a concern - will it be possible to use Unity without the global menu? I have my window manager set to focus-follows-mouse/sloppy focus, and find the productivity gains to be immense. Sloppy focus is incompatible, however, with global menus, as it is possible for the focus to change while you move from window to menu. Will Unity support an option to use window menus while still using Unity?

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• How to retrieve data from a corruped volume

  - by explorex

  Hi, My Ubuntu 10.10 just crashed(probably due to hardware error and in the end I was getting error like Unknown filesystem ..... grub> .. GRUB console before i could take some action) and i reinstalled the same version form USB stick. I had ubuntu installed in ext4 file system and I am also having the same filesystem in the same hard disk on different drive. When I try to access my previous filesystem, i get error Error mounting: mount: wrong fs type, bad option, bad superblock on /dev/sda6, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so I had some important files in the previous volume, I don't know how to retrieve them. And what are the chances that I would get the same outcome (hardware error)? Please help me!

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• Cant mount cryptswap1 ?

  - by Jordan March

  From the reading I've done, it seems it's having issues mounting the encrypted files. The guys here: could not mount /dev/mapper/cryptswap1 Seem to be suggesting how to fix it, but I am new to Linux and have NO idea how to do any of that. Can anyone walk me through how to edit that file? Or should I just reinstal? Is there a way to reinstall and keep my programs? I do have separate partitions for boot root home and swap Running Acer Aspire 5750 Intel Core i3 4gb ram Ubuntu 12.10 64bit

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• Ubuntu 12.04 installation on GPT + RAID going into grub rescue

  - by Proy

  I have two 2TB disks. I am installing Ubuntu 12.04 using the alternate version of the server cd. On the partitioning page I have done my partitioning as follows /dev/sda1 - 32 MB - bios_grub /dev/sda2 - 50 GB -raid device /dev/sda3 - 8 GB -raid device /dev/sda4 - Balance full GB - raid device /dev/sdb1 - 32 MB - bios_grub /dev/sdb2 - 50 GB -raid device /dev/sdb3 - 8 GB -raid device /dev/sdb4 - Balance full GB - raid device After this I have setup raid devices /dev/md0 for /(/dev/sda2 + /dev/sdb2) for / ext4 /dev/md1 for swap( /dev/sda3 + /dev/sdb3)for swap /dev/md2 for /home(/dev/sda4 + /dev/sdb4)for /home ext4 The installation finishes it shows that it is installing grub to /dev/sda and /dev/sdb. But once the system reboots it falls into grub rescue mode. on doing ls I can not see the md devices only hd once. I also tried booting into rescue mode with the install cd and doing grub-install /dev/sda and /dev/sdb. What am I doing wrong ? Why is grub2 not detecting the raid revices ? UPDATE: I just did the same steps with Ubuntu 10.04 and it worked perfectly fine. I wiped out the RAID and partitions and everything and did it from scratch. I think the issue is with Ubuntu 12.04 and the way it partitions 2 TB disks

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• Fan very loud in Ubuntu 12.10

  - by Jon

  I recently installed 12.10 on my Desktop PC, moving away from Windows 7. For some reason, the fan in my computer is making an enormous amount of noise (it is running at full speed constantly). Under Windows 7, the fan would slow itself down and run at an acceptable noise level. Now, it is nearly unbearable. Checked the processes, and none are taking up a huge load on the CPU. Please help as I really can't endure this noise, and I do not want to go back to Windows 7 on this box. Some specs: - Intel 2.26 duo core - ATI 4870 - 4GB - 650W power supply

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• Games installed from repos won't start

  - by Shauna

  I'm running Natty (upgraded from Maverick) with Gnome 3 (from the Gnome 3 PPA, Unity removed), and have recently found that some of my games from the repos no longer work. When I go to start them, I get the message Failed to launch [app name]. Failed to execute child process [app name] (no such file or directory). I've so far found this on Gweled and PyScrabble. Other games (Mines, Sudoku, Mahjongg), as well as other applications have opened just fine. Gweled used to open fine until recently. Any ideas on how to fix this?

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• Ubuntu scrollbars don't render on Cygwin X server

  - by David M. Karr

  I have an ubuntu 12.0.4 desktop. I have a Win7 laptop running Cygwin. I can display windows from the Ubuntu box on the Win7 laptop using the Cygwin X server, but the window is somewhat "degraded". Specifically, scrollbars are not rendering properly. I've used Ubuntu before, but this is the first time I've seen these odd scrollbar popups that are used in 12.04. I'm guessing the Cygwin X server is having trouble rendering that for some reason. In the Cygwin view, I see the slightly thicker vertical bar, but when I hover the mouse over it, nothing happens. I'd really prefer to get conventional scrollbars. Can I configure Ubuntu 12.0.4 to do this, which might result in Cygwin being able to display them?

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• Do I need a wifi card to have internet access?

  - by Sarah

  I am attempting to set up a wireless network on 11.04, freshly download today. The router is on and working. However, I do not have a wifi "card" (which I am assuming is a little USB-type thing that allows internet access, but correct me if I am wrong) and every time I try to type in the MAC address and everything, nothing works. I also get the "firmware missing" error when I scroll over the signal strength, which I have tried looking up but have been unsuccessful with completely understanding it. I guess my main question is do I need another little device to be able to use wifi on my ubuntu? I do have an ethernet cable but another person is using it and I do not want to be tied down to that cable. the problem is that none of the wireless networks show up, however they show up when I go into Windows mode on my laptop. I get an error message at the top saying "firmware missing" which I have tried looking up but still have no straight answer for.

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• How to drag from a background window to the front window

  - by Luis Alvarado

  Is the following I will explain possible with a key combination? Here is the image: As you can see, the terminal is the focus window (Front window) and Nautilus is in the background (Back Window). How can I grab a folder or file from Nautilus without loosing focus on the terminal (Without making the terminal go to the background and Nautilus to the front) and drop it in the terminal?. What I want is not to have to ALT+TAB again just to do this. Options like resizing the windows to fit the screen are not what I am looking for. Like in the image, we have a fullscreen window that we want it to stay like that. We can drag the terminal window around but anytime I access the background nautilus window, I should not loose focus on the terminal (It should not go to the background every time I access Nautilus). Maybe like a key combination that freezes the current focus windows positions and I can drag from background windows to background windows or background windows to the front focused one.

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• Analog and digital audio output at the same time

  - by wim

  My speakers use a digital input, but my headphones use an analog input. I have them both plugged in, and when I want to use the headphones I just turn off the speakers and switch on the headphones. I know that simultaneous output on digital and analog is supported by the hardware, because it worked fine in Windows XP. But on Ubuntu, I seem to only get one at a time, depending on which setting is selected in the combo box located at System -> Preferences -> Sound -> Hardware. How can I get simultaneous analog and digital output without having to switch the profile every time? I'm on Ubuntu 11.04 and it's an HDA Intel chip.

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• How to change ownership for an external HDD?

  - by Angstrem

  I've got an external HDD (640 GB), with file system FAT32. I want to change the ownership of it from root (default) to angstrem (my username). The system is mounted to /media/exthdd. I try to do that by a command: sudo chown -vR angstrem:angstrem /media/exthdd and after that the system gives me an error: chown: changing ownership of `/media/exthdd': Operation not permitted If anybody knows, please tell me, how to change ownership of that HDD?

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• nvidia-settings error: nvidia driver not in use

  - by Bastarasov

  I have an Asus with GEFORCE GT520M CUDA (Optimus) and I am running Kubuntu 12.04, 64bit. I am trying to connect an external monitor through DVI and the monitor is not detected. Nvidia settings dont show properly and each time I fire them up there is a warning message: "You do not appear to be using the NVidia X driver. Please, edit...." (you probably know it and heard of this before). I have googled a lot and I have tried some things out but no luck so far. Is there a solution which has worked for someone out there? If so, please be very specific about what I need to do since I am really not good at using the terminal and generally new to ubuntu. I can use the terminal only to copy-paste things. :) Thanks in advance to everyone! ps. Seems like some people dealt with this by fixing the Nvidia settings problem but the instructions have never been clear enough for me to be able to understand.

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• Good floor planner program?

  - by torbengb

  I'm planning to have a house built. I want to draw up some sketches on the computer, so I am looking for a program that can help me do this. It doesn't have to be a professional architecture tool; in fact that would be too complicated just yet (but maybe later on, for the detailed work...?). A simpler tool would be better. Features should include such things as ability to draw and move walls (not just using simple boxes), calculate room/floor area, add windows and doors, and the like. That's why Inkscape or OOo Presentation won't do. On Windows, a friend would just download a cracked professional architecture tool but that is not what I want to do. Suggestions?

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• How can I stop Ubuntu from automatically unmounting Samba shares?

  - by Billy ONeal

  I have some music files I'd like to listen to sitting on a Samba share. I added this share via the Ubuntu GUI (Places - Connect to server...), and everything worked just fine. However, despite the fact that my music file is playing from this location, after I've not touched the location using the Nautilus GUI, Ubuntu/GNOME decides that I'm not using the share anymore and terminates the connection. Thus, my music stops playing and Rhythmbox is unhappy with me. Simply clicking on the new shortcut the "Connect to server..." bit created for me immediately makes the files come back again and allows me to restart the music playing. How can I have Ubuntu not automatically dismount samba shares?

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• Ibus incompatible with Tor Browser in 13.10

  - by clueless

  I have recently updated to 13.10 from 13.04 and noticed a compatibility issue between the new Ibus and the Tor Browser. Basically, the Tor Browser does not accept any keyboard inputs, while all other programs do. I tested this with the 64 bit versions 2.3.25-11 and 2.3.25-13 and the 32 bit version 2.3.25-13. According to this thread, quitting ibus "fixes" the problem: https://trac.torproject.org/projects/tor/ticket/9353 Any ideas on how to fix this?

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• How would I install drivers for N900 WNDA4100 wireless adapter?

  - by Chris-Flux

  I am currently using a N900 WNDA4100 wireless adapter, and I am unable to install the drivers for it. It is using a Ralink chipset http://www.wikidevi.com/wiki/Netgear_WNDA4100 I found that Ralink does give support to linux http://www.ralinktech.com/en/04_support/support.php?sn=501 however, I am still rather new to Ubuntu and I was wondering if anyone could help me understand how I would install the drivers (on the Ralink website for the RT3573 USB).

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• Can I use ls -R to show up to 2 folder depth?

  - by Aggelos Kolaitis

  I have a folder tree that looks like this main/ main/34532-23423632-2354/what-i-want/sth/other/blah-blah main/54634-56345634-3422/what-i-want/sth/ .... main/54356-34225675-2345/what-i-want/ I want it to show the tree up to the folder what I want. Because the folders sth, other and so on contain many other things that are useless. I just want to see what's inside each folder named xxxx-xxxxxxxx-xxxxx. Is there any way?

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• Force full-screen game to one monitor?

  - by Joachim Pileborg

  I have two monitors, one 1920x1200 and the other 1920x1080, and in 10.10 they were "separate". As in when I opened the display preferences they were shown as separate screens. Since installing (from scratch) 11.04 I instead have one giant 3840x1200 screen spread over the two monitors. Not a problem per se, except when I want to play full-screen games! When playing games I want them to be on the primary (1920x1200) monitor, but since the game only detects one screen I cant do that, even if I lower the resolution in-game. I have a nVidia GTS 250 card, using nvidia-current driver (version 270.41.06), even though "Additional Drivers" reports the driver is "activated but not currently in use". Is there a way to force the game to use only one of the monitors? Or make the game detect both monitors?

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• How to copy existing movie files on ipad to watch?

  - by Rob Van Dam

  I have an iPad and a desktop running Ubuntu 12.04 with lots of movie files of various formats (avi, mp4, m4v, etc). Is it possible to transfer those files from within linux directly to the iPad (without using iTunes to sync) over USB and then play those movies on the iPad without reformatting/resizing all of them? I've used iTunes in a Windows XP virtualbox instance with other iOS mobile devices before but I would prefer a pure linux approach if possible. (I'm creating this question so that I can share the solution I found because I failed to find a simple, satisfactory answer elsewhere).

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• How to cleanup a Local Repository?

  - by maythux

  In my local repository each time i update the packages inside. The problem is: I have many versions of the same package. so, i need to delete the old versions in some way.(don't tell me to do it manually!!) Any ideas?!! Maybe a script that checks the version of each package keeping the newer version and deletind older ones can solve this issue. I am seeking for such script or if some software is founded would be great UPDATE: See this for how to make a local repository

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• javaws crashes, error in ld-linux-x86-64.so.2

  - by user54214

  I am running Ubuntu 11.10 64 bit client as Dom0 and Xen. I am having problems getting java up and running. Java itself seems to work fine, however I get strange errors, for example when I start javaws. I tried different versions and always get the same errors. I tried openjdk 1.6 and 1.7 as well as sunjava6 and 7. I alway get an error in the same lib All other applications are working fine, so it seems ld-linux-x86-64.so.2 is working fine. Any hints what could be wrong? Ubuntu01:~$ javaws # # A fatal error has been detected by the Java Runtime Environment: # # SIGILL (0x4) at pc=0x00007f4e74c5ad10, pid=7974, tid=139974945277696 # # JRE version: 6.0_23-b23 # Java VM: OpenJDK 64-Bit Server VM (20.0-b11 mixed mode linux-amd64 compressedoops) # Derivative: IcedTea6 1.11pre # Distribution: Ubuntu 11.10, package 6b23~pre11-0ubuntu1.11.10.2 # Problematic frame: # C [ld-linux-x86-64.so.2+0x14d10] _dl_make_stack_executable+0x2b70 # # An error report file with more information is saved as: # /home/r/hs_err_pid7974.log # # If you would like to submit a bug report, please include # instructions how to reproduce the bug and visit: # https://bugs.launchpad.net/ubuntu/+source/openjdk-6/ # The crash happened outside the Java Virtual Machine in native code. # See problematic frame for where to report the bug. # Aborted

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• Lots of static/crackling noises after ALSA HDA DKMS installation

  - by MartinB

  I am using a Samsung Chronos 7 laptop with the following sound setup: $ head -n 1 /proc/asound/card0/codec* ==> /proc/asound/card0/codec#0 <== Codec: Realtek ALC269VC ==> /proc/asound/card0/codec#3 <== Codec: Intel CougarPoint HDMI With the stock ALSA that comes with Ubuntu 12.04, I do not get any sound out of the headphones when I plug them into the headphone jack. After plugging the headphones in, I have to manually use Alsamixer to increase the volume, so that the headphones become usable. I have been told that this issue is due to my sound chip not being supported in the ALSA version that ships with Precise. A similar question at AskUbuntu and the Ubuntu Community Documentation point me to the ALSA DKMS installation. After installing the dkms module of yesterday's ALSA snapshot and rebooting, the headphone issue is indeed solved. I can now plug my headphones into the jack and instantly have sound on them. However, now I have tons of static noises and crackling when playing sound in VLC player or Skype (Firefox HTML5 playback seems to be fine, unless a Skype sound interferes with it). Is there a fix for this? I tried adding the Alsa PPA and installing the latest ALSA package proper, but that didn't have any effect, only the Alsa DKMS package seems to solve the headphone issue.

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• Screen has 1px vertical dead area on the right side

  - by pileofrocks

  Meaning that I can not click anything on that 1px vertical area (such as scrollbars). Illustration (purple = screen, black = the dead area): I am thinking Compiz has to be the main suspect, especially as on a guest account, this problem does not exist. I have a dual-monitor setup and this does not happen on the 2nd screen. However, turning off the 2nd display does not make any difference. I had this issue already before upgrading to 13.10 and while doing that, I also resetted all Compiz settings and re-loaded my profile configuration file. I have tried disabling all Compiz plugins under "Window Management" What next?

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• Is there a Visual Studio style tool/IDE?

  - by Tim

  I have been developing in the windows space with Visual Studio for a while now with work, but I have also been using Ubuntu for a while and am keen to get into some software development for linux. I should also note. I am not looking for .NET and I am aware of mono. I am also familiar with c++ development and some python, so the language isn't so much relevant as the "all in one" aspect. I was interested to know if there is a useful all in one code/debug/design(gui) IDE similar to something like Visual Studio but for linux?

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