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I want to see the contents of a debian package, especially if the package is properly cleaning up whatever it installs.

I want to also see how it goes about installing the software, what directories it creates, symbolic links etc.

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6 Answers 6

Use

dpkg -x somefile.deb somefolder

to extract the file that somefile.deb contains into folder somefolder

Use

dpkg -e somefile.deb somefolder

to extract the control data (package scripts, metadata,...) of somefile.deb into folder somefolder.

Some archive manager let you just browser Debian packages like any other archive file.

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Yes it is. A Debian package is in fact only an archived folder. So you should be able to open it with the default Archive Manager (right click -> Open with Archive Manager ). Optionally, you can also extract wherever you want. I hope you will be able to learn a lot from doing so.

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You can use dpkg in a terminal to see which files are in an installed package.

dpkg -L <package>

You can also use it to find out which package a specific file came from.

dpkg -S <file>

See the man-page for dpkg for more options.

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Yes, its just a normal AR archive, like tar part in tar.gz files ( Tape ARchive in that case )

Contents of this archive are three files:

  • debian-binary: deb format version number. This is "2.0" for current versions of Debian.
  • control.tar.gz: all package meta-information. It tells dpkg what to configure when the package is being installed. data.tar, data.tar.gz, data.tar.bz2, data.tar.lzma or data.tar.xz: the actual installable files.
  • The debian-binary file must be the first entry in the archive, otherwise it will not be recognized as a Debian package.
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For installed packages you can see a list of the directories and files it creates as well as the scripts that are used for installation and removal in /var/lib/dpkg/info. All the files are named based on the package. Various extensions indicate the files purpose.

These files can also be found in the .deb which can be viewed with an archive viewer. I tend to use mc from the command line.

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There is dpkg -c package.deb, which lists the files installed by the package, and dpkg --info package.deb, which shows general information including which configuration scripts exist (these are run at various points during installation).

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