487
votes
65answers
368k views

What Application Indicators are available?

I installed Ubuntu 11.04 on one of my systems and I am using the Unity interface. Unity is working quite well so far but I really miss panel applets for net speed, cpu temp, and system monitor. ...
341
votes
11answers
292k views

What are Unity's keyboard and mouse shortcuts?

In Unity, are there any pre-defined shortcuts, e.g. to open the dash or unhide the launcher?
267
votes
7answers
208k views

How to enable hibernation?

In Ubuntu 12.04 and newer, hibernation has been disabled by default in policykit. How can I enable this back?
252
votes
11answers
392k views

How can I configure Unity?

Are there any configuration options for the Unity desktop? There are multiple valid answers for this question spanning over several versions of Ubuntu. For your convenience an index of each below ...
252
votes
6answers
31k views

How do I report a bug?

I found a problem with an application on Ubuntu. How do I best report the issue? What sort of information should I provide?
252
votes
0answers
337k views

How do I install Oracle Java JDK 7? [duplicate]

If I downloaded the latest JDK from Oracle, do I just download the .tar file and extract it to /usr/lib/jvm/?
238
votes
9answers
151k views

What are PPAs and how do I use them?

I keep reading about Personal Package Archives ('PPAs') and people answer questions with a link to a PPA. What's the best way to use these? There are multiple valid answers for this question ...
225
votes
41answers
132k views

What should I do when Ubuntu freezes?

All operating systems freeze sometimes, and Ubuntu is no exception. What should I do to regain control when... just one program stops responding? nothing at all responds to mouse clicks or key ...
225
votes
14answers
177k views

How can I edit/create new launcher items in Unity by hand?

Will Unity allow making custom launcher icons from .desktop files or via menu editing system? (Right now the launcher doesn't give the option to "keep in launcher" on all programs. For some programs ...
225
votes
16answers
266k views

How to add a directory to my path?

How do I add a directory to my $PATH in Ubuntu and make the changes permanent?
223
votes
19answers
167k views

Flash video appears blue

The Problem After updating to Ubuntu 12.04 from Ubuntu 11.10, all video is still blue, whether playing in a browser or a player. Same problem occurs in 11.10 as well. I have tried to uninstall all ...
222
votes
12answers
278k views

How to list all installed packages?

I'd like to output a list of all installed packages into a text file, so that I can review it and bulk-install on another system. How to do this?
217
votes
6answers
230k views

How to enable or disable services?

I read about how to enable and disable services in Ubuntu and it seems that there are different possibilities to manage them. The first method I found is update-rc.d to add new services to startup, ...
210
votes
38answers
113k views

How can I improve overall system performance?

What are your tips for improving overall system performance on ubuntu? Inspired by this question I realized that some default settings may be rather conservative on Ubuntu and that it's possible to ...
199
votes
21answers
319k views

How can I install Sun/Oracle's proprietary Java JDK 6/7/8 or JRE?

I want to install Oracle's JRE and to update to the latest version with the Software Updater when they released. Is there a Ubuntu package that is provided by Canonical or Oracle? Before release Java ...
194
votes
12answers
134k views

How to revert to GNOME Classic Desktop?

I'm used to GNOME Classic and personally don't want to change to anything else, but it seems there is no more GNOME Classic in the Oneiric release. After apt-get installed gnome-session and all, ...
192
votes
31answers
70k views

Comparison of backup tools [closed]

This question exists because it has historical significance, but it is not considered a good, on-topic question for this site, so please do not use it as evidence that you can ask similar questions ...
188
votes
5answers
47k views

How do I modify or disable the HUD's use of the Alt key?

A number of games, Emacs, and the terminal make extensive use of the Alt key. Can Unity be configured to respect this key, rather than launching the HUD with it?
185
votes
6answers
510k views

How can I add a new user as sudoer using the command line?

After I add a user using adduser, I can't see it via System->Administration->Users and Groups unless I logout and then login again. Is that normal? Also, can I set a newly added user as a ...
184
votes
16answers
127k views

How can PPAs be removed?

I've added many PPAs using the add-apt-repository command. Is there a simple way to remove these PPAs? I've checked in /etc/apt/sources.list for the appropriate deb lines but they aren't there. This ...
182
votes
11answers
289k views

How do I upgrade to a newer version of Ubuntu?

What are the different ways I can use to upgrade Ubuntu from one release to another?
170
votes
14answers
145k views

How do I resolve unmet dependencies?

How do I resolve unmet package dependencies? Occasionally, when I'm installing stuff, I get an error like the following: Some packages could not be installed. This may mean that you have requested ...
170
votes
2answers
225k views

Can I move the Unity launcher?

I can’t get used to the new Unity system. I’d like to move the left Unity panel to the bottom of screen (like Windows 7 – more similar is better). But I can't find a way. Is it possible?
167
votes
7answers
456k views

Installing Ubuntu on a Pre-Installed Windows 8 (64-bit) System (UEFI Supported)

I bought a computer with preinstalled Windows 8. But I didn't like Windows 8, so I decided to install Ubuntu as a second operating system. I'm absolutely new to Linux. I have been using Windows for ...
162
votes
11answers
43k views

How do I disable mouse magnet on middle edge with multi monitors?

I use Ubuntu 12.04 on a two screen setup. Multiscreen on 12.04 has generally become much better, but there is one thing that really gets on my nerves: there's a mouse magnet of sorts on the middle ...
161
votes
22answers
158k views

What different desktop environments and shells are available?

This question exists as it fills a specific criterion. While you are encouraged to help maintain its answers, please understand that "big list" questions are not generally allowed on Ask Ubuntu ...
158
votes
14answers
348k views

How do I reset a lost administrative password?

I'm working on a Ubuntu system using a Panasonic CF-50 Laptop. My Client has completely forgotten his Administrative Password. He doesn't even remember entering one; however it is there. I've tried ...
157
votes
13answers
48k views

How to change tooltip background color in Unity?

In a lot of applications the tooltips are just plain ugly (White text on black background, way too much contrast) or even unreadable (black or dark blue text (Hyperlinks) on black background). I want ...
156
votes
36answers
119k views

What lenses for Unity are available?

This question is present as a matter of historical interest. While you are encouraged to help maintain its answers, please understand that "big list" questions are not generally allowed on ...
153
votes
5answers
137k views

What is the 'whoopsie' process and how can I remove it?

On one of my machines I have a process running called "whoopsie". I'm running 12.04 server and never specifically installed anything with this name. Google seems to imply that it has something to ...
150
votes
29answers
292k views

My computer boots to a black screen, what options do I have to fix it?

I am trying to boot Ubuntu on my computer. When I boot Ubuntu, it boots to a black screen. How can I fix this? Table of Contents: If you are trying to install Ubuntu If you have a dual boot ...
149
votes
28answers
135k views

How do I remove or hide old kernel versions to clean up the boot menu or free space?

Every time I install a new Linux kernel, it gets left in the grub config, making the boot menu longer each time. I know I can manually search through the installed packages and remove them. Does ...
148
votes
10answers
69k views

How can I remove Amazon search results from the dash or disable the feature?

How can I disable Amazon search results in the Unity dash?
145
votes
10answers
96k views

“The following packages have been kept back:” Why and how do I solve it?

I just added a PPA repository for the development version of the GIMP, but I get this error The following packages have been kept back: gimp gimp-data libgegl-0.0-0 libgimp2.0 Why and how can I ...
145
votes
4answers
105k views

How to upgrade a single package using apt-get?

How do I update a single package? As far as man apt-get says apt-get upgrade doesn't take a package/list of packages as parameter: upgrade upgrade is used to install the newest versions of ...
143
votes
12answers
65k views

Why does Ubuntu Download recommend 32-bit install? [closed]

Update for 13.10: 64-bit version is now the default and 32-bit is labelled "for machines with less than 2GB RAM" The Ubuntu desktop download screen has a pair of radio buttons you use to select ...
138
votes
15answers
233k views

How do I check if I have a 32-bit or a 64-bit OS?

I downloaded and installed the latest 11.04 version from the official Ubuntu site. However I don't know if it installed the 32-bit or 64-bit version. In Windows 7 I could right click My PC and there ...
134
votes
20answers
99k views

Unity doesn't load, no Launcher, no Dash appears

When I login, nothing happens. I am presented with my desktop wallpaper. No Dash, no Launcher, nothing.
133
votes
14answers
90k views

How to pin Eclipse to the Unity launcher?

How can I pin eclipse indigo 3.7 I have 'installed' at /opt/ to the taskbar? I have tried launching eclipse and right-clicking to choose the 'keep in launcher' option. But when I click that icon, ...
131
votes
4answers
10k views

Why did the command “:(){ :|: & };:” make my system lag so badly I had to reboot?

DANGER! Do not run this command to 'test' it unless you are prepared for a crash and/or force-rebooting your system. I was in my Virtualbox running 12.04 trying to compile an app, and while ...
131
votes
5answers
275k views

How do I install a .deb file via the command line?

How do I install a .deb file via the command line?
129
votes
18answers
25k views

How to create a screencast?

How can I create a screencast on Ubuntu? What applications are available? The app I'm looking for has ideally all of these features: Can record in a format that can be played back easily on any ...
127
votes
11answers
303k views

How do I install and use the latest version of GNOME?

I followed the instructions for compiling GNOME Shell and it did compile with a few errors here and there but it didn't run. I installed GNOME Shell using sudo apt-get install gnome-shell but I got ...
127
votes
14answers
126k views

How well do laptops with Nvidia Optimus work? [closed]

I am considering buying a Dell XPS 15 laptop. The laptop has a Nvidia 420m card which should work with Linux but I keep reading that the Nvidia Optimus technology isn't supported on Linux. I am not ...
126
votes
13answers
44k views

What's the difference between Google Chrome and/or Chromium? What are the advantages/disadvantages to each?

I used Google Chrome in Windows, and am now using Chromium in Ubuntu. Is there any difference to the two programs? What are the advantages and disadvantages to each program? Which one seems better? ...
124
votes
4answers
110k views

How do I determine the total size of a directory (folder) from the command line?

Is there a simple command to display the total aggregate size (disk usage) of all files in a directory (folder)? I have tried these, and they don't do what I want: ls -l, which only displays the ...
124
votes
2answers
133k views

How do I install latest PHP in supported Ubuntu versions (like 5.4.x in Ubuntu 12.04)?

I am trying to update to php 5.4 in Ubuntu 12.04, and I can only get 5.3.6 using official repositories (using apt-get). I'm not really sure how to do a manual update – I'm sorta new to ubuntu, but I ...
123
votes
6answers
62k views

How can I install Adobe AIR?

I am a heavy user of certain applications that are built on AIR. It appears that AIR has discontinued support for Linux. Even the older versions in the Adobe AIR Archives seem to support only 32 bit ...
123
votes
3answers
212k views

Where is the cron / crontab log?

I want to verify if my cron job is executing and what time. I believe there is a log for my sudo crontab -e jobs, but where? I searched google and it I found references to look in /var/log ...
122
votes
3answers
34k views

What's the right terminology for Unity's UI elements?

I've sent a few mails to the Ayatana mailing list regarding some UI suggestions for Unity, but I'm afraid I keep confusing the right terms for the UI element, so I would like to have some ...

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