this post was submitted on 06 Dec 2025
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Linux

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Insights in .deb format ( just sharing what I learned ) (lemmy.ca)
submitted 1 day ago by kionite231@lemmy.ca to c/linux@lemmy.world
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Hello o/

I have been trying to understand the .deb package format and here is what I have learned about it so far.

first layer is the most simple it's just a basic ar archive and we can extract is using ar x filename.deb command. you will see the following files:

control.tar.xz
data.tar.xz
debian-binary
  • debian-binary file specifies the .deb file version which will be 2.0 in most cases.
  • control.tar.xz file contains all the the metadata about the package like the dependencies etc.
  • data.tar.xz file is the file that actually contains all the provided files by the packages.

source:

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[โ€“] hendrik@palaver.p3x.de 8 points 1 day ago
[โ€“] gerowen@piefed.social 5 points 1 day ago

dpkg-deb --build
Makes it super simple to create one. You just lay out a folder with the contents you want to be installed. Just make sure it has a DEBIAN/control sub folder/file because that control file is where you can specify dependencies, package version, name, etc.