Questions related to configuration of Ubuntu software.

learn more… | top users | synonyms

143
votes
25answers
235k views

How to fix Duplicate sources.list entry?

I keep getting this warning whenever I try to run sudo apt-get update. W: Duplicate sources.list entry http://archive.ubuntu.com/ubuntu/ precise-updates/main i386 Packages (/var/lib/apt/lists/archive....
32
votes
9answers
138k views

How do I get permissions to edit system configuration files?

I can't seem to edit and save config files in the root system (eg: /etc/dhcp/dhcpd.config); it just says "permission denied" or the save option is blocked in the text editor. I'm pretty sure I'm a ...
71
votes
7answers
167k views

How do I reset GNOME to the defaults?

I was playing around with some settings, and now I need to reset GNOME to it's defaults - how do I do that?
50
votes
9answers
118k views

How do I enable auto-login in LightDM?

I want user foo to auto-login using LightDM (which has been used by Ubuntu since version 11.10). How would I do that?
34
votes
4answers
121k views

Switching window manager/desktop environments?

In general what is the approach to switch the desktop environment or window manager on Ubuntu? The main difference between stock Ubuntu, Kubuntu and Lubuntu is supposedly the use of Unity vs. KDE vs. ...
39
votes
5answers
37k views

How do I configure Unity 2D?

There are several options to configure Unity 3D via "CompizConfig Settings Manager" respectively its "Ubuntu Unity Plugin". But how do I access Unity 2D's settings? If you are looking to ...
57
votes
3answers
48k views

How can I restore configuration files?

I would like to restore LightDM to its default state, because for some reason /etc/lightdm/unity-greeter.conf is now an empty file. Deleting /etc/lightdm/unity-greeter.conf and then running sudo apt-...
10
votes
2answers
9k views

How can I change the default location of content directories (eg Pictures, Templates, Music) in my home folder?

I have multiple users on my home desktop. I am content with most of the default user directories, however I would like to make one change. I would like to setup a common directory for Music (ie /home/...
7
votes
2answers
19k views

How to make pulseaudio work again?

I was having problems with sound (mono only output), so following advice from another askubuntu question I made some edits in /etc/pulse/default.pa After rebooting I had no sound at all. So I deleted ...
27
votes
4answers
30k views

How can I delay a specific program on startup?

How to delay a program such as cairo-dock (No openGL) or Firefox? Sometimes programs crash when started with other startup apps. I want programs to start 10 seconds late to avoid a crash.
10
votes
1answer
35k views

Macbook Air - how to install a dual bootable Ubuntu 14.04 LTS

On my Macbook Air 10.9.2 without crashing the current setup, how can i install as dual boot: Ubuntu 14.04 LTS ? (can anyone please advise some step by step please)
40
votes
2answers
117k views

Configure screensaver in Ubuntu

How do I configure the screensaver in Ubuntu? I can see that gnome-screensaver is running.
9
votes
2answers
17k views

Reset gnome font configuration?

How do I reset the font settings - actual font and size - to their default? (I changed some values in System->Preferences->Appearance->Fonts) This is particularly important with the new Ubuntu font ...
22
votes
2answers
13k views

How to use https with apt-get?

Does apt-get use https or any kind of encryption? Is there a way to configure it to use it?
18
votes
2answers
13k views

Autoconnecting Bluetooth Devices

Is there a way to set the Bluetooth in Ubuntu to autoconnect to devices it is paired to when it is turned on. Furthermore, is there a way to automatically change the sound output to a Bluetooth ...
12
votes
2answers
40k views

How do I set the correct monitor resolution with Nvidia drivers for a monitor that does not send EDID?

I keep having trouble getting the correct monitor resolution - every time I reinstall, I happen to use a newer Ubuntu release and the old tricks I used to know no longer work. Instead of leaving a ...
6
votes
4answers
12k views

How to configure TATA Photon+ EC1261 HUAWEI

I'm running ubuntu 10.04. I have a newly purchased TATA Photon+ Internet connection which supports Windows and Mac. On the Internet I found a article saying that it could be configured on Linux. I ...
19
votes
2answers
6k views

How can I see what happens during the boot process?

On my machine booting takes more than a minute which is annoying when I see that Windows 7 boots in 20 seconds. Here is what I get when the machine is booting. How can I see what happens when ...
14
votes
1answer
7k views

How do I override or configure systemd services?

Many sysv init scripts used a corresponding file in /etc/default to allow the administrator to configure it. Upstart jobs can be modified using .override files. How do I override or configure systemd ...
9
votes
2answers
15k views

Where can I find a Unity configuration file?

I was wondering if someone can tell me where are the main Unity configuration files, at least the file that you can graphically configure through CCSM. I'm wanting to edit the dash size and the panel ...
0
votes
1answer
2k views

How do I recover the default version of some configuration file?

By accident, I messed up a configuration file. How do I recover the default version without reinstalling or affecting other things?
1
vote
1answer
399 views

How to permanently turn off online results

I don't like getting online results when searching in my dashboard, so I went to System Settings > Security & Privacy > Search, and I turned the setting off: But when I restart my machine,...
11
votes
5answers
3k views

How can I revert a config file back to the originally installed version after I have edited it?

I want to revert a file in /etc/ back to its originally-installed form. I have edited the file since it was installed. How can I revert this config file? Apt is smart enough not to overwrite edited ...
28
votes
4answers
3k views

How do I configure Ubuntu for a public computer?

How would you set up Ubuntu on a computer that will be used as public computer in a library? I need the following features and user restrictions: On boot, a guest user should automatically be ...
21
votes
7answers
19k views

How do I disable automatic remote printer installation?

In Raring, everytime I connect to the network, Cups installs all the printers in the network automatically, some more than once. Furthermore, I connect a USB printer to the laptop every now and then. ...
14
votes
5answers
6k views

How to set the Default Browser from the Command Line?

Tried to set the default browser using the GUI tools but this didn't work overall. Is there a way to configure the system wide default browser from command line?
12
votes
2answers
7k views

Referencing environment variables *in* /etc/environment?

I recently discovered /etc/environment, which seems a more standard way to setup simple environment variables than scripts, but I was wondering if there was a way to back-reference environment ...
9
votes
3answers
4k views

Can I configure a transparent terminal over my wallpaper?

Can I make a transparent terminal wallpaper on my desktop? I've done this in the past but can't remember what I did.
29
votes
8answers
2k views

How to keep “dot files” under version control?

Etckeeper is a great tool for keeping track of changes to your configuration files in /etc A few key things about it really stand out. It can be used with a wide variety of VCSs: git, mercurial, darcs,...
51
votes
2answers
61k views

How can I allow SSH password authentication from only certain IP addresses?

I'd like to allow SSH password authentication from only a certain subnet. I see the option to disallow it globally in /etc/ssh/sshd_config: # Change to no to disable tunnelled clear text passwords #...
9
votes
3answers
11k views

How can I increase the mouse pointer speed beyond the limits set by the Mouse preferences dialog?

In the Mouse preferences dialog I've set the acceleration to max and the sensitivity to min and the mouse pointer is not exactly sluggish, but I'd like to make it even faster. Is it possible to be ...
12
votes
4answers
25k views

How to disable lightdm?

I want to disable lightdm from autostart. Currenty, I run service lightdm disable from terminal, then run startx. update-rc.d doesnt help
12
votes
7answers
19k views

How can I make NetworkManager ignore my wireless card?

I do not want NetworkManager to list or manipulate my wireless card. Can I hide its interface from NetworkManager somehow? I have tried adding this in /etc/network/interfaces, iface wlan0 inet ...
8
votes
1answer
2k views

How can I set different sensitivities for two mice at the same time?

I often use a USB mouse and my laptop's pointing stick at the same time. I can adjust the sensitivity in Mouse Preferences, but the sensitivities of the two mice are so different that I cannot find a ...
18
votes
3answers
33k views

Do files at /etc/apt/sources.list.d need to have an extension '.list'?

In /etc/apt/sources.list.d I have several files for custom repositories. All the names of those files end with .list. Is it obligatory that files in that folder should end with that extension? If yes,...
7
votes
2answers
1k views

How can I move the Dash button from the Unity launcher to the top panel?

In Ubuntu 11.10 the Unity Dash button moved from top-left corner to the launcher. How can I restore the Dash button to the top-corner, as pictured below
5
votes
2answers
19k views

How to enable GRUB menu on Ubuntu 12.04 server?

I have an Ubuntu server installed, and no matter what settings do I try to change, the GRUB menu won't appear. It only shows "Booting hard disk ...10... 9..." and that's all! My /etc/default/grub ...
4
votes
3answers
16k views

How to permanently configure keyboard

I use a Turkish keyboard which i have converted to English(Ubuntu server 12.04). My problem is that the single quote is not present on the keyboard but is instead represent by a comma in midair. To ...
3
votes
6answers
19k views

Upstart can't start MySQL

After an installation of MySQL, I get a few errors and I can't run the MySQL daemon. I've tried uninstalling and reinstalling several times, and I'm not sure what's going on. Here's a snippit of what ...
2
votes
1answer
422 views

Copy the Unity launcher from one user to all users

I would like to add state of art of Unity launcher as template for creating minimal state of art of other users. I was found method how to add apps into template, but not method, how to extract ...
1
vote
1answer
2k views

How can I add items to the indicator-session menu?

Is it possible to add to or edit the Session Indicator menu items? Is there an easy way to do this, or would it involve recompiling a custom build? I cannot find much relating to this online.
7
votes
2answers
7k views

Programmaticaly change lightdm autologin session type

I have problem with lightdm setting autologin session type (using my config tool). Lightdm logs into previously selected session. I see that autologin-session is UNIMPLEMENTED in version 1.2.1. Maybe ...
19
votes
3answers
44k views

How to set all locale settings in Ubuntu

A remote installed application has some encoding problems and on my local machine it is running fine. What is the best way to "copy" my locales to the remote machine? The locales on my personal ...
7
votes
3answers
4k views

How can I make smaller pop-ups on Lubuntu?

I want to see smaller pop-ups but where have I to go to configure this?
15
votes
4answers
3k views

Fixed columns' width in Nautilus

In Ubuntu 11.10 the nautilus version has a new feature, as you can see: it adapts the column's width to the content of the column itself (at least for the Name column). This behavior is not always ...
9
votes
3answers
9k views

How to dynamically enable and disable ipv6 on an interface

How to dynamically enable and disable IPv6 on an interface so that it gets link local address when enabled? I have tried: sysctl net.ipv6.conf.all.disable_ipv6=1 to disable IPv6 and sysctl net....
5
votes
2answers
7k views

How do I make xinput mouse settings persistent for a USB mouse?

I use xinput to change the settings of my USB mouse: xinput set-ptr-feedback 'USB Optical Mouse' 4 1 1 How can I make these settings persistent after unplugging the mouse or rebooting?
6
votes
3answers
8k views

How to enable SFTP Support in cURL?

I have installed curl-7.27.0 and it is working fine how ever it is not working is run below command to find whether it is now, but it showed that : Result of the command curl -V root@ubuntu:~/...
12
votes
2answers
5k views

What is kernel configuration?

Running PowerTOP on an Ubuntu 10.10 system, one of the suggestions are Enable the CONFIG_PM_ADVANCED_DEBUG kernel configuration option. This option will allow PowerTOP to collect runtime ...
7
votes
4answers
5k views

Delete confirmation missing when I hit the delete key

I'm sick of accidentally deleting files and directories as DEL button is badly located on my keyboard. I would really like it if ubuntu asked me to confirm before deleting anything. Is there a way to ...