APT (Advanced Packaging Tool) is the standard software package management system for Debian and its derivatives.

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What are the numbers after the version in the output of apt-cache policy?

This is the output of apt-cache policy firefox firefox: Installed: 26.0~linuxmint1+lmde Candidate: 26.0~linuxmint1+lmde Version table: *** 26.0~linuxmint1+lmde 0 500 http://packages....
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How to stop `apt-get` complaining about unmet dependencies when I manually install the software from source? [duplicate]

I have been installing some applications onto my Debian system. Now there are some that have dependencies that I do not want installed with the applications at the moment. I have managed this by using ...
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Automate installation of VirtualBox Guest Additions via command-line

How can I install VirtualBox Guest Additions from a Bash script, in a unattended way? Whenever I run apt-get -y install dkms virtualbox-guest-dkms from the terminal I'm presented with a interactive ...
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What package managers do popular Unix Distributions Use? [closed]

I am creating a Script and I need to know what package manager each Popular Unix Distribution Uses (especially those distros that are commonly-used for Servers)... I mean: Debian uses apt-get Fedora ...
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how to install newest clang 3.8 by apt

here I have found instruction how to install clang3.8: http://llvm.org/apt/ so I executed: wget -O - http://llvm.org/apt/llvm-snapshot.gpg.key|sudo apt-key add - result: --2015-09-19 12:53:...
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How can I reverse the effect of apt-get build-dep <package>?

When I run: apt-get build-dep <package> privileged it installs the build dependencies for <package>. Now, I know that I can use apt-cache depends <package> to see binary ...
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How to manually insert a repository in source.list?

I tried to add a new APT repository using this command: add-apt-repository ppa:atareao/atareao but I got a "command not found" error. I tried installing python-software-properties, but it's already ...
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No installation candidate for compiz

I tried to install 3d effect on my Debian Wheezy using command $ apt-get install compiz compizconfig-settings-manager compiz-fusion-plugins-main compiz-gnome compiz-gtk But it gives the following ...
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To not autoremove something

I have uninstalled my distro's (Debian Wheezy) package of torchat, and use a newer version I've built myself. Since removing the package apt-get wants me to autoremove something which the software I'...
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Command & binary exists but cannot be executed

I transfered /etc/* files from one Linux server to another and now I have a strange error. Both are Debian Squeeze. When I run a command, e.g. ssh, I get an error: bash: /usr/bin/ssh: No such file ...
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How do I hide packages from appearing in apt system?

The list of uninstalled packages appearing in my aptitude is massive, but is full of packages that I'm very sure I will never ever install. E.g. my laptop is using intel graphics, so it doesn't make ...
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What's the difference between DPkg::post-invoke and DPkg::post-invoke-success?

There are two suggested configuration options to install post-install hooks into Debian's apt/dpkg system: DPkg::post-invoke(1) and DPkg::post-invoke-success(2). For me, only post-invoke seems to ...
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restrict private apt repository with rssh - why does apt-get try /bin/sh?

I am trying to set up a private repository via ssh. My sources.list.d/ contains the entry deb ssh://user@host:/repo ./ user is a certificate only account on host. apt-get update works fine. ...
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Firefox circular-dependency hell on Linux Mint 13

Having difficulty re-installing Firefox, after an installation to resolve places.sqlite issues. It appears that I'm trapped in circular dependency hell. Need to resolve firefox dependency hell to ...
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Why doesn't wicd install its daemon?

Yet again, I've found myself banging my head against the wall after having issues with wicd (the most consistenly buggy piece of widely-used software I've ever used). This time, after installing ...
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How to recreate /var/lib/dpkg/status?

I have deleted some files around /var/lib/dpkg/, namely: /var/lib/dpkg/status /var/lib/dpkg/available /var/lib/dpkg/info/* I understand Debian uses these files to keep some information about ...
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Install Elixir lang on Linux Mint

I've followed the instructions on the Elixir site for Ubuntu by downloading and installing their erlang-solutions_1.0_all.deb but no install target is found when trying to install. $ sudo apt-get ...
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How to list currently not installed packages?

I'd like to output a list of all, currently not installed, packages (they are visible in Synaptic for example) using only shell commands. How do I do this?
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How to add Debian Universe in etc/apt/sources.list?

In /etc/apt/sources.list I added universe to deb http://http.debian.net/debian wheezy main contrib non-free universe When I did aptitude update the log complained about: W: Failed to fetch http://...
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Is it necessary to reboot after a kernel upgrade (via APT)?

I have been wondering this for quite a while. Let's say that you have a Debian server that you keep updated via APT. Usually (every 1-2 months) there are some kernel updates, which will update the ...
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Is it safe to manually perform 'apt-get update' 's operation?

I am trying to keep one my Ubuntu systems up-to-date. The intended target is Not Connected to the internet. Am trying to get all the needed info from another machine with internet access. After a bit ...
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Is it possible to determine what is inside Debian package without installing it?

I need a markdown library for development - based on package names I could not understand which one I should install... den@playground:~$ sudo aptitude search markdown p html2markdown ...
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Can you build apt-get from source? [closed]

I've got a kernel image and an empty filesystem and need to fill it with programs, like a desktop, some basic utilities and software. Can I install apt-get somehow to do that for me? I'm not sure ...
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How to free space on a completely full volume?

I am using Linux. And within an uncontrolled event, my 4GB system disk is full. When I try to uninstall some program by sudo apt-get purge program-name, it gives me this error: /usr/bin/mandb: can't ...
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how can I change what the command “apt-get update” looks for when executing the update?

Forgive my incompetence I am still new to GNU/Linux. I use Debian wheezy. When I type apt-get update I get this at the end W: Failed to fetch http://ppa.launchpad.net/webupd8team/java/ubuntu/...
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What information do I need to solve an APT dependency issue?

I've seen several times people with unmet dependencies, which apt-get doesn't tells straightforward what's the problem, like this one: The following packages have unmet dependencies: libgl1-mesa-dri:...
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Get package sources and repository link

Is there any way (dpkg, apt?) to get a package's sources and URL to repository, if available, in Debian ?
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Untrusted package apt-transport-https

I am using Debian wheezy and I would like to install the package apt-transport-https, which allows to access apt repositories through the https protocol. What really puzzles me is that the apt-get ...
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Debian: keep custom changes in initscript

I had to modify the initscript for Postfix /etc/init.d/postfix to customize it for my special needs. Now I want to ensure, that in case of the postfix package being updated in the future (I am running ...
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Why did adding the Debian testing repository create so many package dependencies?

I have Debian 6.0.4, and I'm running an outdated Geany text editor package. There's no newer version available in the current stable repository, so I added testing packages to sources.list: #debian ...
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How to find out if a specific package is installed on Debian?

I'm working with a Raspberry Pi B+ and Raspbian 5/5/2015 and some guides that are a few years old. I've got an external NTFS HDD hooked up to the Pi. Due to the articles age(s), common practices ...
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compile source package with multiple cpu cores in debian, “apt-get -b source”

I use apt-get -b source and this command download and compile source with one core of cpu, Is there any way to compile package in debian with apt package manager with multiple cpu cores ? like -j ...
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Why do I constantly have to update my apt cache?

When I want to install a new package, I'm usually greeted with a response like: oliver@cloud:~$ sudo apt-get install unison Reading package lists... Done Building dependency tree Reading state ...
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What are pros/cons of dselect and apt-get?

I hardly ever hear anyone mention dselect, a deprecated package management front-end for Debian. Considering that it still exists as part of dpkg source, it must still have its uses. What are those? ...
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Using apt or aptitude to get version information about an uninstalled package?

I'm looking to install a package, but I'd like to make sure that I can't get a more recent version than, e.g., a PPA. Is there an aptitude or apt-get command that will enable me to input a package ...
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upgrade xdebug without using apt?

I'm running debian 5.0.6 and have installed xdebug 2.0.3 via aptitude. Now I want to install PHPUnit, and when trying to do it through pear, I get the error that PHPUnit wants a more recent xdebug ...
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Why does apt-get think packages “are no longer required”

I ran apt-get install raspberrypi-net-mods on my Raspberry Pi running Raspbian and got the following message:- The following packages were automatically installed and are no longer required: git ...
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How to install a specific debian package

I want to install a particular version which is not available from apt-get utility but is available from https://packages.debian.org (like https://packages.debian.org/wheezy-backports/exfat-fuse for ...
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How to list all aptitude user tags or the user tags for a package?

I'm in a bit of a pickle. Following my own counsel I started using user-tags when working on projects, but now I don't remember how I called some of these tags and this cancels their usefulness. Is ...
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What exactly does the --names-only option of apt-cache do?

According to the manual, it search regex... search performs a full text search on all available package lists for the POSIX regex pattern given, see regex(7). It searches the ...
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Can removed Debian packages have leftover files?

I noticed a weird thing in my /etc/init.d files and tried to look a bit what was going on. Here's my problem: # apt-file search /etc/init.d/minissdpd minissdpd: /etc/init.d/minissdpd # dpkg-...
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Why am I getting so many hits searching for “git” in the apt cache?

When I give the following command: apt-cache search git | wc -l I get the answer 756. How can I list just the half-dozen or so apps associated with git?
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Invalid signatures when running apt-get update

I'm new to linux and am trying to run an update, I get a lot of "Hit"'s and "Ign"'s but in the end I get these errors, does anybody know what they mean and how I can fix them? W: GPG error: http://...
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How to make apt recognize an installed tar package?

I've installed Oracle Java. I want to be able to remove OpenJDK, but when trying to do so apt wants to install another version of Java. How can I configure apt so that it knows I already have a ...
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How to select packages start with “mate-” but not end with “-dev”?

I want to install all MATE packages, $ sudo apt-get install '^mate' However, it selects too many packages, and some packages are conflicted with some installed ones. Now, I want to exclude them. ...
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Are bsdutils, coreutils, and busybox all necessary in a Debian install?

I first installed Debian with a netinst CD without networking, then edited /etc/apt/sources.list to point to the main repository, then ran dhclient eth0 to set up networking. Then I installed less. ...
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Two different lists of installed packages

I'm trying to get an authoritative list of installed packages in order to find the explicitly installed ones as is done here. This command gives me one list aptitude search '~i !~M' -F '%p' --...
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Get kernel source: apt-get install vs apt-get source

I'm looking forward to download a Linux Kernel to get to know how to modify it and how to compile it. I am using Debian distribution and I'm interested in the Debian-modified Linux Kernel rather than ...
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How do I remove persistent config data from APT?

When I remove packages from my system with APT-based programs, they often leave behind some kind of residue (referred to as "residual config") that seems to serve no purpose other than annoying me. ...
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Why I was able to fix a broken package with aptitude but I could not with either apt-get or synaptic?

Yesterday I upgraded my Debian Testing and Audacious stopped to work. Troubleshooting I found that the problem was that it was updated to a recent version but the needed plugins were not. I tried to ...