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26 Sep 2007 Advanced APT user tricks

Debian/Ubuntu apt-get tricks.

Basics

Install software

apt-get install foobar

Search software

apt-cache search foobar

You can query files to see which packages own them, or query packages to see which files own them.

Installing apt-file

apt-get install apt-file

Build apt-get file information cache

apt-file update

Query through the packages to determine which package contains the file

apt-file search mysqld

Query the other way around, you know the package name and would like info about all the files which are provided by a given pacage:

apt-file list mysqld

List all installed software/packages

dpkg --get-selections > software.txt

That will save your installed list to a file called software.txt. That list is every piece of software required to reproduce the state your PC is currently in.
Another way to get a full list of installed software is to run the command

dpkg --list

To restore a PC the list above

# dpkg --set-selections < software.txt
# apt-get dselect-upgrade

Clearing up space
Delete archived packages that are considered old.

# apt-get autoclean

Delete all archieved packages

# apt-get clean

Remove every file from a package

apt-get remove foobar --purge

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30 Apr 2007 Finding which package contains a file in Debian

There are times when you’re looking for a particular library, or file, which you know is available to Debian/Ubuntu but you cannot find the package which contains it. This is the kind of job that the Debian packages site helped with in the past, but given its current unavailability we’ll look at another approach. (more…)

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