11
votes
2answers
11k views

I can't boot into a usable system after updates. What should I do?

Due to updates, my machine can no longer boot properly. I am no Ubuntu guru. I do not have a week to spare diagnosing the issue. I just want to retrieve important data from this machine's hard drive ...
5
votes
6answers
15k views

Permission denied, are you root?

I get this error whenever I try to install programs using the terminal: home@ubuntu:~$ apt-get install myunity E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied) E: Unable ...
110
votes
13answers
79k views

How do I optimize the OS for SSDs?

What steps should be taken before/during/after installation of Ubuntu on a Solid State Drive to optimize performance and ensure maximum durability of the drive?
62
votes
12answers
92k views

How do I disable X at boot time so that the system boots in text mode?

Is it possible to disable X at boot time? I'm setting up a server so it would be nice if it wouldn't load the graphical interface every time I boot.
107
votes
3answers
79k views

How do I enable or disable Apport?

The system crash dialog is annoying me, how can I turn it off? I'd also like to know how to turn it back on just in case I need it to report a problem.
80
votes
3answers
53k views

How to use Alt+Shift to switch keyboard layouts?

I recently upgraded to Ubuntu 13.10, with the new keyboard handling system. The little "switch keyboard" option does not let me set it to Alt+Shift. How can I get this keyboard binding, as I have ...
47
votes
5answers
71k views

Getting MTP enabled devices to work with Ubuntu?

Since Ubuntu 13.04 storage access to external devices via MTP is supposed to work out of the box via a GVFS-MTP module. While this question is about the Galaxy Nexus, other Android devices as ...
67
votes
9answers
35k views

How do I run executable scripts in Nautilus?

When I double-click on a script in Nautilus to run it, the script just opens in my text editor with no option to run it. Using Nautilus, how do I run executable text files and/or scripts?
31
votes
1answer
37k views

How do I boot into a root shell?

When booting to the graphical desktop fails we sometimes are recommended to boot into a "root shell" or to boot in "recovery mode". How do I do that?
28
votes
2answers
72k views

What does Package <package> has no installation candidate mean?

What does the above Error mean? What is an installation candidate? I was trying to do sudo apt-get install munin-memcached and I get this message: Reading package lists... Done Building ...
61
votes
10answers
80k views

Desktop does not show when I installed nvidia drivers!

The desktop does not show after I installed nvidia experimental drivers. I tried nvidia simple proprietary drivers, and they did not work either. Here is how it looks. This is not cropped or any ...
38
votes
5answers
53k views

How do I add a swap partition after system installation?

I did not opt for a swap partition during Ubuntu installation. Later I freed up some space, and made a swap partition. Now after booting up I am manually opening gparted and right-clicking the swap ...
56
votes
6answers
202k views

Where is the X.org config file? How do I configure X there?

As Ubuntu 10.10 seems to neither detect my graphics card (Intel 82852/855GM) automatically nor use the corresponding Intel driver even after manually installing it, I am looking into manually ...
19
votes
6answers
5k views

How can I check the integrity of a downloaded Ubuntu CD?

I've just downloaded a CD image of Ubuntu. I know the installer has a check CD option, but how can I check that the image is good before burning it to CD?
22
votes
2answers
1k views

How do I install software using the Ubuntu Software Center?

The title says it all. I'd like to know how I can install software - an example is the Chromium web browser.
32
votes
0answers
11k views

How do I switch to the Classic GNOME Desktop? [duplicate]

Possible Duplicate: How to revert to GNOME Classic? How can I setup the Natty Classic Desktop to be "really" classic? I want to have the menus in the application window and I want to have ...
125
votes
2answers
143k views

How to enable TRIM?

I know that the Linux kernel supports TRIM as of version 2.6.33, so there should be TRIM support in ubuntu. Is TRIM enabled by default or do I need to change some settings or install additional ...
86
votes
30answers
257k views

How do I download a YouTube video?

For a school project I need to download three youtube videos and save them to a CD. I am running Ubuntu 10.10; can anybody provide instructions on how to do this? I'm fairly new to Ubuntu so the more ...
44
votes
8answers
95k views

Can't install ATI proprietary drivers in 12.10

I have a laptop with ATI Radeon 6770M HD Hybrid graphics card. In Ubuntu 12.04, I installed the fglrx driver through "additional drivers" and it worked. (I can even switch GPUs). But in the new Ubuntu ...
46
votes
11answers
35k views

Desktop doesn't remember brightness settings after a reboot

Every time I reboot my machine the brightness goes back to 100% in Gnome. I wish it would keep the last setting. Is there anyway?
22
votes
9answers
162k views

How do I run .sh files in Terminal?

Whenever I open a .sh file, it opens it in gedit instead of the terminal. I can't find any option similar to Right Click → Open With → Other Application... → Terminal. How do I open this file in the ...
1
vote
2answers
8k views

How to install with Wubi when it says “Could not retrieve the required disk image files”?

I tried to install Ubuntu 12.10 with the Wubi installer while running Windows, because my PC does not accept my BootCD as a bootable medium. But Wubi showed me this error: ...
165
votes
36answers
128k 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 ...
67
votes
6answers
50k views

How do I access and enable more icons to be in the system tray?

So I'm messing around with Natty a little, and I noticed that all the apps that would normally use the system tray (or "notification area"?) aren't displaying there. Is that a bug, or is that the way ...
63
votes
3answers
21k views

Can auto-hide for the application menu be turned off in Unity?

Will there be a way to disable auto-hide behavior of global application menu in Unity. While I would prefer to have this behavior disabled by default (as it is bad UX), it looks like it's here to ...
38
votes
2answers
4k views

Why user should never use normal sudo to start graphical application?

I've read the comunity "RootSudo" documentation and am interested in this line: You should never use normal sudo to start graphical applications as Root. Why? What is the difference? Please ...
29
votes
3answers
24k views

Is there a program to mount all of my drives automatically?

Sometimes when I restart my computer, my drives will mount but sometimes they won't (like right now when I'm typing this question out). Is there an easy way, like a program that can mount them for ...
16
votes
5answers
34k views

Windows 8 removes Grub as default boot manager

I have a Sony VAIO S series with Windows 8 preinstalled, and I installed Ubuntu 12.10 on a new partition. When the PC boots Grub is display, and I can choose between Windows 8 (didn't worked at the ...
37
votes
6answers
70k views

How do I get my Mac to boot from an Ubuntu USB key?

If you select "USB" and "Mac" on this download page, it gives a series of command line instructions to make a USB key which the MacBook will boot into Ubuntu from. I've followed them to the letter ...
3
votes
0answers
2k views

How do I fix “malformed line” errors in sources.list? [duplicate]

Possible Duplicate: How do I remove a malformed line from my sources.list? I had problems with my movie player. The sound was fine but the picture seemed to hesitate or stick or pause ...
153
votes
14answers
113k 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, ...
24
votes
2answers
125k views

How can I uninstall a nvidia driver completely ?

As expected, Nvidia drivers have reduced my customizations. I can't login to Unity 3D session. I can't find any content to help me to uninstall the driver and I don't know what to do as I have never ...
35
votes
7answers
13k views

At what time will the upcoming Ubuntu release be made available?

Every six months a new Ubuntu version will be released. Does anyone know at which time this will be?
21
votes
8answers
59k views

How to find out root password for installing software

I'm trying to install the NetBeans IDE in my Ubuntu and in the process it's asking for my root password which I don't remember. I know my sudo user password. How can I recover my root password?
94
votes
6answers
18k views

Best way to cache apt downloads on a LAN?

I have multiple Ubuntu machines at home and a pretty slow internet connection, and sometimes multiple machines need to be updated at once (especially during new Ubuntu releases.) Is there a way where ...
106
votes
10answers
83k views

How can I reduce or increase the number of workspaces in Unity?

I was reading about how to get multiple workspaces in the mutter version of Unity, however since Compiz is replacing Mutter how do I go about adding and removing workspaces in Compiz version of Unity? ...
69
votes
11answers
11k views

What's the easiest way to set up a LAMP stack?

I set up a new VPS instance of Ubuntu and am wondering what the easiest way is to get up and running with a basic LAMP stack (i.e. which packages are required, which configuration options need to be ...
76
votes
9answers
29k views

How do I remove a website from Ubuntu's web applications?

I thought I would try out the new webapps ppa and everything seems to be working fine. However, google reader now floods my messaging menu with all my feeds and turns the icon blue. How can I remove a ...
11
votes
4answers
12k views

Why does my laptop with AMD Radeon HD 76xx graphics get overheated when using Ubuntu?

I bought a new laptop which came pre-installed with Windows 7. I love working on Ubuntu and hence installed 12.04 on my laptop. I can work on Windows for 6 hours at a stretch and feel the laptop being ...
3
votes
3answers
29k views

“Unable to locate package” while trying to install packages by apt

When I try to install any package through the command line, I get an error. Can anyone help me on this? $ sudo apt-get install <package> Reading package lists... Done Building dependency tree ...
44
votes
0answers
83k views

How to safely upgrade from an older Ubuntu version to a newer one? [duplicate]

How can I safely upgrade an Ubuntu installation from one release to another? What should I do before upgrading to ensure it goes smoothly, and is there any clean-up I need to do afterwards? In ...
72
votes
5answers
128k views

What is the correct way to completely remove an application?

I've searched the net for such information and found different command lines, like these ones: sudo apt-get remove application sudo apt-get remove application* sudo apt-get remove --purge ...
59
votes
16answers
68k views

How do I free up disk space?

My Ubuntu cloud server has left only 900MB of disk space. I'll just empty the directory /tmp and wondering if there is any other location to clean up.
62
votes
8answers
4k views

How to get my software into Ubuntu?

As a developer of free software, I want to get my application into Ubuntu. Should I provide a source tarball and ask for packaging? Or should I create a package myself? Should I target Ubuntu ...
53
votes
4answers
31k views

Clock time is off on dual boot

Dual boot system Windows XP Pro and Ubuntu 12.04. I have the bios set for the correct time and Ubuntu set for US Eastern time. Ubuntu will boot up and the time will be off by -4 hours. If I correct ...
26
votes
2answers
15k views

How do I change to a theme not listed in the Appearance screen?

I just upgraded to 11.10 for better or worse. When I launch "Appearance" I see only Ambiance/Radiance themes available In /usr/share/themes and ~/.themes there are other themes that aren't listed, ...
29
votes
2answers
42k views

How do I use the gconf editor?

I see some answers where people post to set a key in the gconf-editor, however there is no entry for gconf-editor in my menu. How do I run it and how do I use it to set keys that people recommend?
3
votes
0answers
2k views

Software center not opening [duplicate]

Possible Duplicate: Software Center empty “No usefulness from server” “no username in config file” I can't open the software center. Is there anything I can do to get it to start? $ ...
280
votes
5answers
648k views

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

How do I install a .deb file via the command line?
108
votes
18answers
65k views

I have 16GB RAM. Do I need 32GB swap?

I read many places that the rule of thumb for swap space is to double the amount of physical RAM. However, 32 GB does seem a LOT. Do I need that much? Do I need it at all with this high amount of ...

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