Questions about the management of packages, in particular the `dpkg` system.

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226
votes
13answers
240k views

How do I resolve unmet dependencies after adding a PPA?

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 an impossible situation or if you are using the ...
135
votes
19answers
116k views

How can I install software or packages without Internet (offline)?

I have a friend who has got a computer that is not connected to the Internet. Is there any way to install software offline easily?
60
votes
7answers
13k views

Why don't the Ubuntu repositories have the latest versions of software?

Why are packages in the official Ubuntu repositories older than the latest (upstream) versions from Debian Sid, PPAs, the authors, etc.?
116
votes
14answers
62k views

How to backup settings and list of installed packages

If I want to make a backup of everything I have done since the fresh install of Ubuntu, what are the possible options? What all should I backup? I want to get all the settings that I changed, all the ...
92
votes
9answers
59k views

How to prevent updating of a specific package?

Because of bug #693758 I'd like to prevent apt-get upgrade and Update Manager from updating the "libgtk2.0-0" package. How can this be achieved?
382
votes
15answers
515k 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?
25
votes
4answers
129k views

How do I enable the “Universe” repository?

How do I get to Universe Repository of Ubuntu software as mentioned in Ubuntu 12.04 LTS? I am installing 12.04 Ubuntu. Please help.
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 ...
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 ...
51
votes
4answers
66k views

Requires installation of untrusted packages?

I tried installing VLC Player yesterday, and I got the Requires installation of untrusted packages error. I searched for hours for a solution to this problem, and finally came upon a suggestion that ...
74
votes
3answers
69k views

How do I deal with “unauthenticated sources” errors in the Software Center?

Any install that I'm trying through the Software Center is telling me: Requires installation of untrusted packages: The action would require the installation of packages from not authenticated ...
27
votes
2answers
24k views

How do you run a 32-bit program on a 64-bit version of Ubuntu?

I have a 64-bit version of Ubuntu 13.10. I want to run a 32-bit version of a program. However I see ia32-libs is not included in 13.10. Is there a replacement package for this or what?
8
votes
6answers
12k views

Dependency error while installing WINE

Every time I try to install "WINE" VIA the Software Center on Ubuntu 12.10, I get this error: The following packages have unmet dependencies: wine1.4: PreDepends: dpkg (>= 1.15.7.2~) but ...
46
votes
4answers
28k views

If I build a package from source how can I uninstall or remove completely?

I used source code to build one package such as below: ./configure --prefix=/usr --sysconfdir=/etc --localstatedir=/var --libexecdir=/usr/lib --with-package-name="Myplugin" ...
14
votes
3answers
48k views

How do I enable the “multiverse” repository?

I keep seeing places refer to the "multiverse" repository as a place I can get software, how can I enable this repository? Please specify how to do this graphically and via command line.
12
votes
3answers
90k views

how to install packages with apt-get on a system connected via proxy?

I've got an Ubuntu 11.10 system connected via a proxy to the internet, and I would like to install packages via apt-get. When I try to do that I get this error message: sudo apt-get install ...
25
votes
4answers
18k views

How to set up an APT repository?

I would like to set up an APT repository on a server that will provide a couple of packages. Is there a way to set one up without installing any software on the server? How do the files have to be ...
28
votes
10answers
21k views

How do I install and manage RPMs?

I have a burning desire to install RPMs onto my Ubuntu installation - is this possible? Can I use Yum - or another RPM Package Management tool?
57
votes
11answers
7k views

Why can't I update applications without upgrading the whole OS?

In Ubuntu, once a release is out the software one has installed receives security updates only. In Windows, I can get new versions of programs with new features. How can Windows do this and why can't ...
26
votes
6answers
23k views

How do I enable the “partner” repository?

I keep seeing places refer to the "partner" repository as a place I can get software, how can I enable this repository? Please specify how to do this graphically and via command line.
-3
votes
0answers
303 views

Unable to locate package [duplicate]

There are many questions about Unable to locate package. For example : if user try to install package by using apt-get then the following error shown. (Here package is used only as example for ...
6
votes
3answers
8k views

Cannot install any software from the Software Center due to ttf-mscorefonts-installer package error

When I try to install any software from ubuntu software center it comes with error: An unhandled error occured There seems to be a programming error in aptdaemon. This is the software that allows you ...
10
votes
4answers
62k views

trying to overwrite '/usr/bin/opencv_haartraining', which is also in package libopencv2.3-bin 2.3.1+svn6514+branch23-12~oneiric

After installing some packages and libraries I have an error on Package Manager, I can't run any update because it says: The package system is broken If you are using third party repositories ...
11
votes
4answers
46k views

How to resolve “Failed to download repository information”?

Whenever I try to install anything with the Ubuntu Software Center, the following error appears. Failed to download repository information Check your Internet connection. E:Unable to ...
69
votes
5answers
86k views

How to Downgrade a Package via apt-get?

How to downgrade a package to an older version via apt-get?! Another tools are also accepted but apt-get is preferred.
22
votes
8answers
6k views

What is a “bad quality” package?

What does it mean to have a Bad Quality Package (What qualities would it have to be a Bad quality package) and what happens if I install a package that has bad quality but still installs.
66
votes
5answers
22k views

How do I find the package that provides a file?

Simple enough question: is there some shell command (or GUI method) I can use that, given the path to a file on my system, tells me what package put it there? Assuming the file did in fact come from a ...
50
votes
3answers
120k views

How can you completely remove a package?

I am trying to do a clean install of the octave3.2 package. To do this, I removed it, then tried to reinstall it. When I reinstalled, an error occurred. It could be a bug in the package, but I ...
6
votes
6answers
28k views

Package system is broken. How to fix it?

I just recently bought an arduino and requires gcc-avr/avrdude to compile the software. I installed avr for another microprocessor component a while ago but is obviously an outdated version (gcc ...
209
votes
11answers
153k 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 ...
108
votes
6answers
38k views

Is aptitude still considered superior to apt-get?

When I first started with Ubuntu using aptitude was the 'in-thing', with some stated improvements over apt-get. Am I correct in saying that apt-get has now 'caught up' with aptitude, and it makes ...
9
votes
7answers
15k views

How can I update Ubuntu offline without using Synaptic or Keryx?

I use Ubuntu 12.04 at my home and have good internet connection and my system works fine. One of my friend is having small office and he is thinking to switch from Windows to Ubuntu 11.10 or above. ...
13
votes
3answers
3k views

How do I add the “proposed” repository?

I'm trying to either test a fix that's been proposed or I want to volunteer to test stable release updates before they are pushed out to general users, how can I enable the "proposed" repository?
18
votes
4answers
42k views

How do I re-install Network Manager without an internet connection?

I have only wireless connection, one computer with a connection and 4gb usb . My second computer has no network connection, because I have deleted it from the software center. However, now I want to ...
13
votes
2answers
447 views

Why doesn't Ubuntu ship an application, or the latest versions of some applications?

What reasons are there for applications in Ubuntu not being the most up-to-date, and why are some applications not available, in its repositories?
8
votes
3answers
35k views

E: Unable to correct problems, you have held broken packages

I am using Ubuntu 13.04 which I installed few days back. I am trying to install nodejs and npm. I tried to install from command line first and then uninstalled it. Then something broke. sudo apt-get ...
2
votes
3answers
7k views

What should I do when the GETDEB repository is down?

I'm trying to install programs/files from the getdeb repo but get a "check your internet connection" error. Programs than I've tried include Qbittorrent and Mozilla-Plugin-VLC. Through the ...
104
votes
6answers
71k views

How can I install just security updates from the command line?

sudo apt-get upgrade installs all updates, not just security updates. I know that I can use Update Manager to select only important security updates, but is there a way to do this from the command ...
35
votes
3answers
22k 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 ...
22
votes
6answers
9k views

How do I remove all packages from a certain repository?

For a smooth upgrade from 10.04 to 10.10, I would like to remove all packages which are not in the default repositories (e.g. chromium PPA and third-party repositories). What is the easiest way ...
18
votes
6answers
6k views

How do I list installed software with the installed size?

I would like to have a list the installed software on my machine, with the disk space consumed by them alongside. I would prefer to be able to order by largest/smallest, but that is not a necessity. ...
12
votes
3answers
34k views

How do I enable the “Universe” repository from the command line?

How do you use terminal to enable Universe source? Or any those 4 from Software Sources: Main, Universe, Restricted, Multiverse Main is on by default and Restricted is on if durring Ubuntu ...
8
votes
4answers
34k views

Remove Gnome Shell completely after installing it?

I wanted to try gnome-shell in 11.10 (also 12.04 now) I removed it, however, classic Gnome is still there and the battery icon is changed (too big and can't use a icon pack on it like faenza) Also, ...
31
votes
1answer
4k views

How to create a meta-package that automatically installs other packages?

I'd like to be able to create a package that doesnt contain any code or programs itself, but instead installs other packages that exist in the repositories onto a computer, sort of how the ...
11
votes
3answers
6k views

APT wedged by kernel version mismatch

Apt is seemingly unable to do anything useful for me, repeatedly giving messages of this form: dpkg: dependency problems prevent configuration of linux-server: linux-server depends on ...
14
votes
3answers
3k views

apt-get remove with wildcard removed way more than expected. why?

Last night I was trying to burn CDs. Being annoyed with k3b and choosing to use brasero instead, I went to remove k3b. I typed in: sudo apt-get remove k3b I hit tab twice and saw that I had both ...
18
votes
4answers
6k views

What is the difference between a meta-package and a package?

I've heard some packages being classified as a meta-package. So now I am left wondering what is the difference between a meta-package and a package?
11
votes
7answers
95k views

How to configure proxy authentication to work with Ubuntu Software Center?

I have tried put in apt config Acquire::http::proxy, and in Network>Network proxy with and without user:password@server:port and using environment variables http_proxy and https_proxy. Nothing seems ...
16
votes
0answers
6k views

How to find and delete duplicated sources list entries? [duplicate]

Is there a command line to find and delete duplicated entries in the /etc/apt/sources.list file? or is this possible via synaptic perhaps?
100
votes
9answers
5k views

What's the difference between package managers?

I know Ubuntu/Kubuntu has several programs that can be used to install packages, such as apt-get, aptitude, and synaptic (and perhaps others). What are the differences between them, and which one is ...