Questions about software packages, installing them, removing them, updating them and finding them.

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306
votes
15answers
405k 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?
92
votes
6answers
253k views

How to install updates via command line?

Good day, When I log into my web server via SSH I see the information: 88 packages can be updated. 80 updates are security updates I tried apt-get update then apt-get upgrade but each time I log ...
72
votes
3answers
63k 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 ...
59
votes
5answers
68k 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.
45
votes
3answers
55k 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 ...
44
votes
4answers
22k 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" ...
39
votes
2answers
27k views

What does the “Basic Ubuntu Server” package contain in software selection during installation?

I'm installing Ubuntu 12.04 from an Ubuntu Minimal image, and I've gotten to the software selection part. What I'm wondering is, which packages are included in the "Basic Ubuntu Server" option? I'm ...
29
votes
1answer
3k 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 ...
28
votes
2answers
764 views

What precautions should I take with .debs I find on the internet?

So I was browsing the web the other day, and I came across a few places that wanted me to download .deb files - and since those are installed by root (and as such have the "powers" and capabilities of ...
26
votes
8answers
12k views

Where do I get a package for GNU Parallel?

I want to install GNU Parallel in Ubuntu but I can't find a package for it in the default Ubuntu repos. Where can I get it?
25
votes
6answers
3k views

Why the software center doesn't allow multiple downloads?

I was wondering why the software center doesn't download all the requested apps and install one by one as they finish to download. Or instead why the software center doesn't download an app while the ...
25
votes
4answers
15k 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 ...
23
votes
3answers
2k views

What does the “-ng” suffix mean in package names?

Several package names contain the suffix -ng: $ apt-cache search "\-ng$" linux-wlan-ng - utilities for wireless prism2 cards aircrack-ng - wireless WEP/WPA cracking utilities apt-cacher-ng - caching ...
23
votes
2answers
3k views

How do I create a PPA for a working program?

Let's assume I have a working application written in C, C++ or Python. I want to create a Launchpad PPA so others can easily install it from a package. Please give step by step instructions for doing ...
22
votes
5answers
16k views

Will python2.7 be available for 10.04 in the future?

Since Ubuntu 10.04 is an LTS release will it support python 2.7 as a default package maintainer version or at least have a python2.7 package in future? Since it will be the last major python 2.x ...
22
votes
3answers
52k views

What is the Difference Between `apt-get purge` and `apt-get remove`? [duplicate]

Possible Duplicate: What is the correct way to completely remove an application? Is there any difference between sudo apt-get purge <package-name> and sudo apt-get remove ...
22
votes
1answer
4k views

What's the difference between flashplugin-installer and adobe-flashplugin?

I usually installed flashplugin-installer and by chance noticed that in the partner repository the Flash entry says it's not installed. It also says the package flashplugin-installer will be removed ...
20
votes
4answers
21k views

How to install GUI desktop on a server?

After installing Ubuntu server how do I install the desktop environment?
20
votes
6answers
6k views

How do I figure out what package something is in without resorting to Google?

I often find myself wanting to install something, but I'm unsure of what package it's in. This is a very common occurrence for me: $ make html sphinx-build -b djangohtml -d _build/doctrees . ...
20
votes
4answers
16k views

How to disable multiarch support?

I don't want to install any i386 package. Is there any way to disable functionality?
20
votes
4answers
781 views

Is it possible to tell what packages I've installed that aren't in the vanilla install?

I've upgraded Ubuntu on my laptop all the way from 7.04 to 10.04 without ever wiping the disk. I have a sneaking suspicion that means I have a bunch of crufty packages that I don't use and that are ...
19
votes
8answers
5k 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.
19
votes
2answers
525 views

What security differences are between click and .deb package?

Installing a random (nasty?) .deb can be dangerous because it will grant all privilege to the apps and daemon installed because the .deb has some configs asking to applied if the user valid his ...
19
votes
2answers
355 views

Is there a congrats ubuntu page?

Say for example I use a particular package and want to say "Way to go maintainers" is there a way for me to do this?
18
votes
3answers
5k views

Is this command to remove old kernels safe to use?

While browsing the internet for Ubuntu articles, I came across this command: sudo dpkg -l 'linux-*' | sed '/^ii/!d;/'"$(uname -r | sed "s/\(.*\)-\([^0-9]\+\)/\1/")"'/d;s/^[^ ]* [^ ]* \([^ ...
18
votes
5answers
10k views

Is it possible to install a .deb from a URL?

Is there a way to install a deb package directly from a URL, using a shell? Something like dpkg -i http://domain.com/path/to/package.deb (I know I could use wget and then dpkg, I'm just wondering ...
18
votes
4answers
5k 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?
18
votes
1answer
9k views

How to check if a LaTeX package has been installed?

How to check if a LaTeX package has been installed in Ubuntu? When installing, I followed the methods mentioned in http://math.arizona.edu/support/tex/accountpackages.html and ...
18
votes
1answer
32k views

Apt-get saying “Unable to correct problems, you have held broken packages.” [duplicate]

Possible Duplicate: How do I resolve unmet dependencies? TL;DR: sudo apt-get install ... saying "Unable to correct problems, you have held broken packages." The problem I was trying ...
17
votes
3answers
9k views

Is there an apt command to download a deb file from the repositories to the current directory?

I am often interested in the installation triggers (postinst, postrm) or certain parts of packages (like /usr/share and /etc). Currently, I am running the next command to retrieve the source code: ...
16
votes
4answers
15k views

How not to install recommended and suggested packages?

I use Ubuntu 12.04 64-bit, I did the following, sudo gedit /etc/apt/apt.conf and added APT::Install-Recommends "false"; APT::Install-Suggests "false"; but did not work. When I try to install a ...
16
votes
1answer
2k views

What is the 'popularity-contest' package for?

I'm installing ubuntu server at the moment, and noticed it in the configuration phase. What does this package do, what is it for?
16
votes
2answers
8k views

How do you see what packages are available for update

FreeBSD user joining your ranks. I've been asked to look after an Ubuntu Server running 10.04 LTS. I see from /usr/lib/update-notifier/update-motd-updates-available that there are a number of ...
15
votes
4answers
721 views

Why are softwares not packaged in a single file?

We see Most of the Windows softwares are packaged in a single executable file. When I double-click Setup file, it sets up all the files, binaries and libraries with it. I understand the dependency ...
15
votes
4answers
14k views

How do I add the kernel PPA?

I can get Ubuntu mainline kernels from this kernel PPA - is there a way to add it to my repository list the same as regular Launchpad PPAs?
15
votes
1answer
4k views

What exact purpose have transitional packages?

What are transitional packages and what exact purpose do they have?
14
votes
2answers
115k views

Install gcc on Ubuntu 12.04 LTS

When I try to install gcc on Ubuntu 12.04 LTS Server with apt-get install gcc, I get the following error: The following packages have unmet dependencies: gcc : Depends: cpp (>= 4:4.6.1-2ubuntu5) ...
14
votes
4answers
689 views

How to manage software that is installed from source?

From time to time, we may have to install something from source due to various reasons. While it is fairly standard how to install software given appropriate dependencies, it is not clear to me how to ...
14
votes
3answers
366 views

How can I know what programs does some apt-get package contains?

I would like to know what does some specific package install, for example, when installing ncurses, I have found that TAB key expands: sudo apt-get install ncurses- to show: ncurses-base ...
14
votes
3answers
435 views

How are packages suggested and what is the difference between extra and new packages?

When installing a new package via "apt-get install", I usually just tick yes if it is a program I need/want, but, I read through it, and, I am a little curious as to what the sections actually mean. ...
13
votes
6answers
13k views

What package is right for my computer?

I am running on Ubuntu 11.10 32 bit, and I am wondering what packages of software I should download; namely, RPM, DEB, or TAR GZ. I have encountered having to choose from this list while trying to ...
13
votes
2answers
441 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?
13
votes
2answers
627 views

What are the conceptual and technical differences between “Apps” and packages?

I'm a bit confused by the recent announcement (http://developer.ubuntu.com/2011/09/announcing-the-ubuntu-app-developer-site/) of the new "App" developer site. I've fallen out of Ubuntu development and ...
13
votes
1answer
6k views

How to download, modify, build and install a Debian source package?

If I want to make minor changes to the source code of a Debian package, how do I go about downloading, incrementing the package version, building the (modified) source, and installing it on my ...
13
votes
1answer
1k views

How to get a list of preinstalled packages?

And I'd like to get this list directly and if possible from an external source (maybe repositories?). Almost all one-liners I have found didn't work for me. So I hope there is an indicator somewhere ...
13
votes
1answer
7k views

Emacs, which to use?

There seem to be the following versions: emacs23, emacs23-nox, e3, emacs23-lucid, and jove, as choices to download. Where can I find out what the differences are?
13
votes
1answer
318 views

What the meaning of package version number with word 'really' in the middle?

Command apt-cache show postgresql will listed this information in my machine (Saucy Salamander 13.10): $ apt-cache show postgresql Package: postgresql Priority: optional Section: database ...
13
votes
2answers
1k views

What are the downsides of removing ubuntu-desktop metapackage?

I once advised someone to remove a package that depends on ubuntu-desktop meta-package, if she didn't need it (EG: if one uses a different editor than gedit). Someone else said that doing so (removing ...
12
votes
8answers
12k views

How do I find packages to install via apt-get

After doing a man apt-get and cursory Google search it's not clear how I find new programs to install (from the internet) using apt-get (which is amazingly powerful and simple coming from another ...
12
votes
3answers
81k 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 ...