debfoster
From the man page:
debfoster maintains a list of installed packages that were explicitly requested rather than installed as a dependency.
After months of use, I end up with a lot of packages that I don’t need, that I installed to build something, or just to try to solve a specific problem (that I no longer have). But it’s very difficult to keep track of those packages.
Of course, we have apt-get autoremove and deborphan, but it’s difficult to whitelist packages in those tools.
Here comes debfoster to the rescue. The usage is very simple, you just need to run it and interactively mark the packages that you want to keep.
For example:
sudo debfoster
imagemagick is keeping the following 10 packages installed:
gsfonts imagemagick-6-common imagemagick-6.q16 libjxr-tools
liblqr-1-0 libmagickcore-6.q16-6 libmagickcore-6.q16-6-extra
libmagickwand-6.q16-6 libnetpbm11 netpbm
Keep imagemagick? [Ynpsiuqx?], [H]elp:
If you enter y, debfoster will remember that you keep that package.
If you enter n, debfoster will delete imagemagick and all the dependencies.
How it works? It keeps the whitelist of wanted packages in a plaintext file, so it’s very easy to edit it and remove previously whitelisted packages:
$ cat /var/lib/debfoster/keepers
apt-xapian-index
build-essential
colordiff
(...)
Available options
These are the available options (reported by entering H):
Yes Keep imagemagick. [default]
No Delete imagemagick.
Prune Delete imagemagick and the packages it is keeping installed.
Skip Skip this question.
Help Print this message.
Info or ? Show information about imagemagick.
Undo Undo last response.
Quit Exit without removing packages.
Exit Remove unwanted packages and exit.