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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41
votes
3answers
98k views

How to find a text file which contains a specific word inside (not in its name)

I want to find a text file in my hard disk which contains a specific word. I want to use a graphic application. I'm on 12.4 "Precise Pangolin". Prior to Ubuntu 12.4 I used to start in the dash an ...
41
votes
6answers
64k views

What alternatives for sticky notes are available?

I like the Sticky Notes very much, they are always on the desktop. But in the current version of Ubuntu (12.04), I can't find it. Other programs like gnotes & Xjournal are not giving a feature to ...
39
votes
5answers
44k views

How can I create launcher icon for PhpStorm?

I have PhpStorm on my PC, to launch it I have to go to phpstorm/bin/ and launch phpstorm.sh, how can I pin this to launcher so that I dont have to go into folders every time?
39
votes
3answers
48k views

How to keep apache and mysql from starting automatically

Is there a way to make apache and mysql not run automatically on startup? Currently, whenever I boot my machine, they start automatically and run in the background. I am using Ubuntu 12.04.
39
votes
5answers
82k views

How do I move (copy) my entire Ubuntu system to a different hard disk?

The HDD I have my Ubuntu installed is about to fail. I would rather not lose 3 years worth of data, customisation and apps. I am looking for a way to move the complete system (SWAP included, because ...
37
votes
3answers
51k views

How do I set a shortcut to screenshot a selected area?

In gnome's screen shot program, the quick keys PrtScn captures the entire screen and alt+PrtScn captures the active window. Is there a way to script or set up the third capture option of a selected ...
37
votes
2answers
24k views

How to open Nautilus at current command line directory?

I was wondering if anybody knew a command that would allow me to open a Nautilus (if that's the right name for the Ubuntu 12.04 graphic/window explorer) window from the command line at the current ...
36
votes
1answer
42k views

What is the app, “compiz” responsible for on ubuntu 12.04?

When I open my system monitor and check the "processes" tab, I've noticed that regardless of what other apps I have running, "compiz" is always taking roughly 10% of my CPU. It might be a broad ...
33
votes
2answers
66k views

how to find the current version of gnome

I'm using ubuntu 12.04. I tried $ gnome-about –gnome-version gnome-about: command not found $ gnome-session --version gnome-session 3.2.1 Why I need is because my desktop environment doesn't ...
31
votes
4answers
14k views

How to ungroup windows on task switcher?

I'm playing with ubuntu 12.04, precise pangolin, and there's an issue I can't see how to solve. If I have three instances of, let's say, Firefox, in the switcher appears a single Firefox icon, I have ...
31
votes
3answers
38k views

How can I install MonoDevelop v4 on 12.04?

I am using Ubuntu 12.04. I can install v2.8.6.3 of Monodevelop from software center but I need at least v3 to use Monogame v3 or higher. Can anyone point me in the right direction please? Thanks
31
votes
3answers
30k views

Trying to start nginx on VPS, I get “nginx: unrecognized service”

Following the How to install rails and nginx with passenger on Ubuntu tutorial from DigitalOcean.com, the seventh step manually starts nginx: sudo service nginx start but fails with the following ...
29
votes
6answers
52k views

Why won't Remmina connect to Windows 7 Remote Desktop?

I'm using Ubuntu and I'm trying to connect to another machine in a different network using remote desktop. In Windows7 I have made the following in order to activate remote desktop: I've gone to ...
29
votes
2answers
63k views

How to see/change screen refresh rate or monitor frequency?

My eyes hurt so I thought I should check the screen refresh rate (monitor frequency), but I couldn't find it. Where is it? (in Ubuntu 12)
29
votes
3answers
74k views

How can I install Qt 5.x on 12.04 LTS?

If you want to develop with QML 2.0 and Qt5, the base packages don't seem to exist in repository for 12.04. What PPA should I add? Is it a binary installer? a compile the toolkit yourself? Those ...
28
votes
1answer
15k views

How can I disable [alt] for search? [duplicate]

Possible Duplicate: How do I modify or disable the HUD's use of the Alt key? In 12.04, the [Alt] key pops up the HUD. That's not a problem, but, when using [Alt]+... it pops up as well. ...
28
votes
2answers
20k views

How to disable Grub's menu from showing up after failed boot

I am performing a test in which I hard-reboot a machine with Ubuntu during its boot sequence (just before login prompt appears). After the reboot, GRUB's menu shows up with no timeout (not its ...
28
votes
2answers
41k views

What are the rcuos/rcuob processes I'm seeing in top?

I ran top, and I see lots of rcuos/rcuob processes. Here's a sample of top output: top - 21:41:15 up 22 days, 19:20, 1 user, load average: 0.00, 0.01, 0.05 Tasks: 332 total, 1 running, 331 ...
27
votes
2answers
38k views

How can I get f.lux working?

I've installed the fluxgui package from Killian Valkhof's PPA (https://launchpad.net/~kilian/+archive/f.lux) and started the applet by pressing alt+f2 and typing in fluxgui. The inidcator icon shows ...
27
votes
7answers
27k views

Is it normal for compiz to consume 40% of my CPU with no other programs running?

When I have no other programs running, compiz takes up at least 40% of my CPU. Is this normal? If it is normal, is there anyway I could make this program take a smaller percentage?
27
votes
5answers
3k views

Drag and Drop across (fullscreen) applications, switching via Alt-Tab

Example Drag media file onto Totem's playlist to enqueue Bug in Compiz Especially for Unity (formerly Netbook Edition, being intended for small screens) this is quite a vital feature, as ...
25
votes
3answers
62k views

Changing System name [duplicate]

I am given an old Ubuntu working system and the previous user had everything on his name so started turning it to my name as typing his name everywhere was bugging me. I tried: $ usermod -l hussain ...
25
votes
4answers
28k views

Permanantly set monitor as primary

I am running Ubuntu 12.04 (beta) with a triple head setup and GNOME 3 desktop (ie "GNOME" selected not "Ubuntu" at login screen). It seems that it handles multiple monitors by blessing one monitor to ...
25
votes
1answer
39k views

W: GPG error: http://ppa.launchpad.net precise Release: The following signatures couldn't be verified because the public key is not available:

I get the following error when i do sudo apt-get update W: GPG error: http://ppa.launchpad.net precise Release: The following signatures couldn't be verified because the public key is not available: ...
25
votes
2answers
1k views

How can I find out if someone logged onto my computer through putty?

I am suspecting that a Windows user logged onto my computer with my password. So, is it possible that I can see a trace of logging in on my computer?
25
votes
8answers
56k views

Stuck on reboot and shutdown

I've recently installed Ubuntu 12.04 and I love it. However I have one problem- I am unable to shutdown or reboot properly. When I shutdown my laptop (Acer Aspire 5560) it hangs on the 5 dots and ...
24
votes
6answers
30k views

What is the function of the “Sticky edges” on/off setting in displays?

I have installed Ubuntu 12.04 (Precise Pangolin). If I open System Settings >> Displays there is a new (?) on/off button for a setting named Sticky edges. Can someone tell me what this setting ...
24
votes
7answers
21k views

Google Chrome not rendering webpages correctly

I am facing some serious web page rendering issues with Chrome. It is more prominent during javascript based animations and stuff on websites like youtube. I have tried removing chrome using (sudo ...
24
votes
5answers
8k views

Can I apply a different GTK3 theme from the main one to an individual application?

For example, can I keep Ambiance as main theme but assign elementary theme to elementary's app?
24
votes
1answer
9k views

Public IP Address for LXC container

Ok, so I want to know how to do networking on LXC containers. Not just the sort of vague information you get from the other websites, but a true beginner's guide to making them work.. Since most ...
24
votes
9answers
6k views

Nautilus is very slow

One month ago I updated (no fresh install) to 12.04. Since then nautilus got extremely slow. When I open a folder that contains many subfolders I sometimes have to wait 4 seconds until everything is ...
24
votes
2answers
37k views

What is the best video editor on Ubuntu for editing multi-format/multi-eco?

I have many video clips with different formats and I want to create a short movies by joining them. Most of the clips are taken with Nokia N8 and Lumia 800. I am using Ubuntu, I have tried many of ...
23
votes
5answers
15k views

vim is not remembering last position

My Ubuntu LTS 12.04 has vim editor. If I open a file, move to a paragraph and reopen vim, then the cursor goes to beginning of the file always. This is not the expected behavior. How the vim can ...
23
votes
3answers
13k views

How to see the actual memory and its properties (slot position, size, speed…)

I have 2 PCs. A Laptop dv600 and an Intel dp35dp. I want a command that shows me how many slots of memory I am using, the size, speed, etc.. For the moment the size of each would be good. Maybe see if ...
23
votes
1answer
9k views

Using Alt+Tab in Remmina RDP connection

In Ubuntu 12.04, I want to use Alt+Tab in remote PC connected using Remmina by RDP connection. At this time, when I go full screen, this shortcut is always handled by "host" and not by remote machine, ...
23
votes
4answers
45k views

How can I install a realtime kernel?

I have read a lot of threads with similar questions, but after reading the answers, I am very confused. I have found in them lots of url's with repositories but people discusses about which ...
23
votes
3answers
51k views

Network manager indicator missing

I recently upgraded from 11.10 to 12.04. My first attempt failed, and I received an error stating that not all of the required packages were downloaded. Before (successfully) attempting again, I ...
23
votes
4answers
12k views

Why is Rhythmbox becoming the default (again)?

So, it seems with 12.04, they're switching back to Rhythmbox, after switching from Rhythmbox a year ago. I don't get why. They say that it's because of a blocking bug in GTK3# (if I understand that ...
23
votes
1answer
25k views

Alt + Tab is not working in gnome shell at ubuntu 12.04 [closed]

I have installed ubuntu 12.04 and running gnome-shell. So far almost everything went fine, but Alt + Tab is not working. How can I get Alt + Tab working? or there is some other alternative?
22
votes
7answers
17k views

How to install new tmux 1.8 on Ubuntu 12.10 or 12.04?

Are there any PPA? If no, how to make it from sources? Which dev libs I'll need to do this?
22
votes
7answers
36k views

Python HTTPS requests (urllib2) to some sites fail on Ubuntu 12.04 without proxy

I have an little app I wrote in Python and it used to work... until yesterday, when it suddenly started giving me an error in a HTTPS connection. I don't remember if there was an update, but both ...
22
votes
4answers
128k views

Installing MS Office 2013 on Ubuntu 12.04 LTS

I am trying to install Microsoft Office 2013 on Ubuntu 12.04 LTS (32-bit). I have downloaded an iso file of said product and installed wine1.4-i386 using the apt-get command on the terminal. The ...
22
votes
6answers
33k views

Hibernate missing from power menu and when I press laptop power button

When I upgraded from 11.10 to 12.04 my Ubuntu power menu has lost the ability to hibernate. Is there a way to add that back in, or is this default for 12.04?
22
votes
10answers
27k views

How can I change the auto-hide function of Launcher to work better? [closed]

I'm new to Ubuntu, 11.10 was the first version of Ubuntu I used, it was very good. I've just made a new install of 12.04 (clean install, not upgrade), it's also very good too but the auto-hide ...
22
votes
2answers
77k views

Is this a correct way to enable htaccess in Apache 2.4.7 on Ubuntu 12.04

In almost every solution of "How to activate htaccess", they say that the /etc/apache2/sites-available/default file needs to be edited. But there isn't such file in Apache 2.4.7 I read somewhere ...
22
votes
1answer
22k views

Align windows with keyboard shortcuts? [duplicate]

Possible Duplicate: Is there a shortcut to tile windows to left or right side of the screen? I'm running 12.04 inside VMWare Workstation. Windows 7 provides a very useful feature: use ...
21
votes
4answers
86k views

How to disable IPv6 on Ubuntu?

I disabled IPv6 on an Ubuntu box which has ssh and rsync running. But both of these are still listening on an IPv6 address. How should I fix this? root@box.com:~# sysctl ...
21
votes
3answers
35k views

Copy files without losing file/folder permissions

How can I copy files/folders from an ubuntu computer on a ext4 filesystem to another ubuntu computer which also is on an ext4 filesystem, using a usb stick which uses a vfat filesystem without losing ...
21
votes
3answers
38k views

Why does kworker cpu usage get so high? [duplicate]

I recently installed Ubuntu 12.04 on my Samsung laptop alongside Windows 7. Whenever I use Ubuntu (even when its idle) kworker uses almost 90% of one of 8-cores. Even though it doesn't really affect ...
21
votes
3answers
26k views

In what directory(s) are the default ubuntu icons located?

I accidentally deleted the Downloads bookmark, and I wanted to recreate it with the same icon, but I can't find it.