Fourth LTS (Long Term Support) release of Ubuntu, code-named Precise Pangolin. Released on 26th April, 2012. Only use this tag if your question is version-specific.

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Key's won't repeat, holding them down causes the screen to flash

This is driving me nuts, and it started seemingly out of the blue. While typing, if I hold down a key, it will not repeat, however, the cursor flickers in sync with the rate that the character would ...
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9 views

Why I can't to edit XFCE menu in BackBox Linux?

all friend.. I want to edit Menu in BackBox linux. But I can't to edit it. How to do it? can you help me? look like this image: http://oi62.tinypic.com/259byf8.jpg
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1answer
15 views

12.04 LTS stuck on login screen

I have Ubuntu 12.04 running on VirtualBox under Windows 8. I've had it for about a year now and have had no problem whatsoever. A few nights ago, out of nowhere and while I was in the middle of ...
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27 views

problem with background image size

I have Ubuntu 12.04 installed and I just added a bunch of wallpapers. They look fine when opened using an image viewer, but when used as the actual desktop background they exceed the monitor size ...
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21 views

Ubuntu freezes when streaming audio

For the last fews months or so, ubuntu will suddenly freeze at seemingly random intervals when streaming audio (such as listening to spotify, watching a youtube video). To date, it has not frozen when ...
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6 views

Upgrade from ubuntu 12.04 to 14.04, freezing login

After I upgraded my ubuntu 12.04 to 14.04, everytime I login, my screen freezes and I have no control through keyboard or mouse. I entered in recovery mode and could see that it still was ubuntu ...
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1answer
20 views

Installing BC and any maths extension

I need to install "BC" (I think this is a language so I am guessing I need to install a parser but I seriously have no clue - would I need to install anything else?) onto Ubuntu 12.04 and any ...
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1answer
23 views

ubutnto 12.04 64bit runs very slow

Help! Ubuntu 12.04 64bit runs very slow on: my Ubuntu runs very slow on my computer I almost cant do anything 8GB RAM intel core i7 2.4 intel graphics HD 4600 what should I do??? and how can I ...
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16 views

Dependency problem with tor

I am trying to install tor via this tutorial via option 2. I receive this error when finally installing tor via sudo apt-get install tor The following packages have unmet dependencies: tor : ...
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28 views

Erro Package Dependencies cannot be resolved on install software

When i am trying to install transmageddon in my ubuntu12.04 .It produces error that says,Package Dependencies cannot be resolved. The following packages have unmet dependencies: transmageddon: ...
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39 views

Will not boot after upgarde from 10.04 to 12.04.5

I have a Windows 7 partition and a Ubuntu partition I tried to upgrade from 10.04 to 12.04 via the update manger on the command line. I got the following message at the end when the machine tried to ...
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26 views

How to update an earlier version of Ubuntu 10.04? [duplicate]

I tried to update Ubuntu 11.10 or an earlier version of Ubuntu 10.04, but I have a problem. When I go to System -> Administration -> Update Manager I can't update because the computer shows me this ...
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37 views

Mysterious crashes/freezes in Ubuntu 12.04

I am using 64 bit Ubuntu 12.04 for last two years. Machine is slightly older 3 years or so. No hardware changes to machine - even using same mouse and keyboard. I keep service packs up to date. No ...
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1answer
18 views

Can't create directory in etc for hadoop?

I am following hadoop installation tutorial. It says that Unpack the downloaded Hadoop distribution. In the distribution, edit the file etc/hadoop/hadoop-env.sh to define some parameters as ...
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11 views

No sound after can not update ICEauthority fix 12.04 LTS

Hi I installed the mozilla vlc-plugin . I have fixed the problem with not beeing able to log in. Now the sound has gone, I cannot turn the volume up. I have tried in terminal to change alsamixer sound ...
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6 views

Lynx non-English fonts display and log in problem

i just installed Lynx browser ( which doesn't have GUI and executes in terminal and i use G u a k e Terminal) but the terminal does not show Persian fonts which have right to left alignment. it ...
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2answers
42 views

How to prevent certain websites in my browser

I am using Firefox 33.0 on my Ubuntu 12.04 but apparently there is no way I can prevent a website from being opened in the browser, is there another way to do that, like using some system ...
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1answer
44 views

IcedTea Doesn't Run Properly in Firefox

I have Java 7 installed for Ubuntu 12.04 and I have IcedTea installed in Firefox (33.0). Some Java plugins are not working correctly. For example: starting from the IcedTea-Web-Tests (see the IcedTea ...
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2answers
51 views

How do I download wine on 12.04 [duplicate]

can someone please tell me how to download wine so that I can open exe. files. Many Thanks, Dave.
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22 views

Setting up hotspot with hostapd & udhcpd on wlan0 with internet on eth0

[Ubuntu 12.04] I am trying to achieve a simple configuration that uses the Internet from eth0 and sets up a hot-spot on wlan0. But my requirements has constraint of not using NetworkManager. And I am ...
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36 views

Android Phone is not recognized on Ubuntu via USB

using ubuntu 12.04 and LG optimus G E975, usb debugging was working fine 2 days ago and now it just stopped working, when I plug the device into my laptop (all 3 usb ports), it just shows the charging ...
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1answer
35 views

rsync exclude a single file from the root folder

I want to rsync from a folder, which contanins index.php (which need to be excluded), and many other directories contains index.php too. i created an exclude file and added index.php there. but all ...
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20 views

Dualboot my system [closed]

I want to dual boot my machine. I have already installed windows 7 on my machine . I am trying to install Ubuntu via USB . I have carried out all the steps of loading the OS on to the USB . I have ...
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10 views

ntp possible on ad hoc network in ubuntu ? 12.04 onwards

I am doing a research project on Vehicular Ad hoc networks.. I am using C programming language for socket programming, with four laptops installed with Ubuntu 12.04 and 14.04 versions. All the laptops ...
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19 views

Is it possible to install gdb 7.7 or greater version in ubuntu 12.04.4?

I am having gdb 7.04 in ubuntu 12.04.4. when i tried to upgrade gdb it gives message that gdb 7.04 is the latest version. Is it possible to install gdb 7.7 in ubuntu 12.04.4 ? and i dont want to ...
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17 views

Unable to connect to wifi on Ubuntu 12.04

I was installing docker on my Ubuntu machine. It got some errors while installing and after that my wifi is not working. Docker Installation install the backported kernel $ sudo apt-get update $ ...
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21 views

Errors when trying updates and software center [duplicate]

Getting errors when trying software center and updates manager. various other things don't work either. error relates to Battery: E:Encountered a section with no Package: header E:Problem with ...
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1answer
21 views

TOR browser delete history securely

I downloaded the Tor Browser off of: https://www.torproject.org I am curious if this deletes everything SECURELY from your browsing history automatically when you close it, or is there something ...
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2answers
41 views

Installing Ubuntu 12.04 on MacBook 5,5, can't boot from USB flash drive

I am trying to install Ubuntu 12.04 (Precise Pangolin) on a mid 2009 Macbook Pro. I am attempting to follow the instructions here: ...
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7 views

How to timestamp TX/RX/IDLE state of my TP-Link WN722N

I'm working to develop a new Networking protocol in AdHoc Network, I need to timestamp activity in the driver when start/ stop TX, RX, and IDLE states, I'm working in Ubuntu 12.04 with x86_64 platform ...
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12 views

How do I set the background for lightdm-kde-greeter

I'm running Gnome desktop in 12.04 and installed the lightdm-kde-greeter. But I'm not sure how to change the background. Google has been no help, as all the suggestions say to go to the System ...
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49 views

Chromebook: How can I boot into Unity at startup?

I have an Acer C720 Chromebook. Using Crouton, I have installed Unity. I boot into it by typing the sudo startunity command in shell. Since I feel Chrome OS has nothing to offer me at the moment, I ...
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44 views

Accidently deleted header files in /usr/include/c++

I accidently deleted the folder with all the C++ header files that resides in /usr/include/c++. What do I do to recover the UPDATE I did get the header files back now in /usr/include/c++. However, ...
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51 views

ubuntu on tonbux 10 inch tablet [duplicate]

I am a big fun of ubuntu. I recently bought a tonbux tablet 10 inch with android. I have tried to install ubuntu on it but I don't seem to be able to unlock the device, has anyone tried this before ...
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1answer
29 views

Ubuntu not Booting ,GRUB screen not disappearing

while installing Ubuntu, I choose the first option(erase disk and install Ubuntu). After the installation is complete I reboot my machine and what I got is a purple screen (I think the purple color is ...
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19 views

Ubuntu 12.04 Nvidia driver for GeForce GTX 770 is activated but will not load and is not in use

I am running Ubuntu 12.04 with a GeForce GTX 770 (product no. P4-2773-KR). A few days ago, after a reboot, the Nvidia driver stopped working. The "Additional Drivers" windows says that nvidia driver ...
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10 views

Ubuntu 12.04 - can't connect to internet via eth0

I was doing some things, just some text-editing with vim to fix up a bug on my web script but suddenly my machine started lagging - some Java program that was ideling was throwing some errors - and I ...
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2answers
38 views

one click show/hide sticky notes ubuntu 14.04 gnome flashback

On ubuntu 12.04 I'm used to this "sticky notes" application: Sticky Notes 3.4.1 Sticky Notes for the GNOME Desktop Environment © 2002-2003 Loban A Rahman, © 2005 Davyd Madeley which was very handy ...
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23 views

Saving Nvidia resolution settings

before I begin, I want to say that until now I have only used Windows OS and have no experience with linux at all. I have decided to make the switch to Ubuntu and installed 14.04.1. I am using a ...
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1answer
39 views

Server 12.04 LTS Desktop Environment install “Package xubuntu-desktop is not available, but is referred to by another package.” [duplicate]

I am trying to build the HP SDN VAN controller on Server 12.04 Precise but need a GUI to download the controller. When i try to install a desktop i get the following (I have already done an apt-get ...
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1answer
21 views

Delete temp files options for clearing the log files

how to delete the temp file and cache files in ubuntu? where as in windows o/s we have cmd prompt to view the %temp% cmd to delete it? so kindly make the which cmd to use this option
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8 views

Seeing incorrectly 'Hash Sum mismatch' via apt-get on a mirror…anybody else? [duplicate]

anybody else getting this on sudo apt-get clean all ; sudo apt-get update W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/precise-updates/restricted/binary-i386/Packages Hash Sum ...
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22 views

Determine if Zebra is installed in ubuntu server

What command line should be use to determine if zebra is installed in my ubuntu server?
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1answer
33 views

Unable to resolve “E: Unable to correct problems, you have held broken packages.”

In Ubuntu 12.04,I am trying to install less and handlers using npm.While installing npm I found this error sudo apt-get install npm Reading package lists... Done Building dependency tree ...
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8 views

Server internal chat server

I'm looking for a chat server for Ubuntu 12.04 which basically allows a chat between authenticated system users. Let me explain. The use case is that on a remote headless server running a remote ...
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1answer
25 views

Virtualhost document root access previous folder

How to access previous folder via index.html that not included in virtualhost document root. For example: <VirtualHost *:443> DocumentRoot /var/www/banking/personal-banking ...
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28 views

Mounting ubuntu 14.04 host folder into VirtualBox guest Ubuntu 12.04 directory

I have a host ubuntu machine running ubuntu 14.04. I would like to share it home folder - let say /home/ln. I have installed a virtual machine using virtuabox running ubuntu 12.04. I want to share all ...
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33 views

Sound not working 12.04 after update

my sound was working perfectly fine while suddenly it stopped after an update... I tried reinstalling alsamixer and stuff - did not work. When I start alsamixer, here is what i get: Also in the ...
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68 views

Ubuntu 12.04 Hangs at *Will Now Halt* fixed with pci=noacpi but this results in NO WIRELESS

pretty new to linux. I've just bought an Asus X553M and installed Ubuntu 14.04 I found that i could not shut down the system, it just hangs on #will now halt. I installed 12.04 but it still happened. ...
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35 views

iOS devices cannot connect to hostapd wireless Access Point

I've managed to setup an AP on pc running ubuntu 12.04 with a wireless adapter with a RTL8192CU chipset. The pc is connected to internet via wlan0 and the access point is setup on wlan1. I can ...