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The Debian System -- Concepts and Techniques The Debian System -- Concepts and Techniques
Martin F. Krafft Open Source Press / No Starch Press ISBN 3-937514-07-4 / 1-593270-69-0
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grep-dctrl

Posted by semifor at November 30. 2005
The other day, I stumbled upon this entry about the vrms package:
http://www.debian-administration.org/users/orchid/weblog/5

vrms (Virtual Richard M. Stallman) displays a list of installed, non-free packages.

Having just recently read the The Debian System section 5.11.9, page 254, which discusses grep-dctrl and its variants, I thought that perhaps the same result could be obtained with tools already installed.

The following command gives me the list of installed non-free packages on my system.

grep-status --show Package --field=Section non-free \
--and --field=Status 'ok installed'

It's nice to know how to use the tools you have.
Posted by madduck at December 01. 2005
I bet vrms exists mostly for the name. Thanks for taking the time to figure out how to use grep-dctrl to achieve the same. It is truly a very useful tool, and getting better every day -- the developer is actively working on it.
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