Definition: debfoster: Install only wanted Debian packages debfoster is a wrapper program for apt and dpkg. When first run, it will ask you which of the installed packages you want to keep installed. After that, it maintains a list of packages that you want to have installed on your system. It uses this list to detect packages that have been installed only because other packages depended on them. If one of these dependencies changes, debfoster will take notice, and ask if you want to remove the old package. This helps you to maintain a clean Debian install, without old (mainly library) packages lying around that aren't used any more.
Once in a while, you may want to do some maintenance on your Ubuntu machine and clean up unnecessary files that are chunking up large storage space in your hard disk.
Debfoster creates a dependency files to enable you to keep track of what you have installed. When you uninstall an application, it will check for any leave behind dependencies files or orphaned packages and ask you if you want to remove it.
Install debfoster, or via the terminal,
sudo apt-get install debfoster
Creating the initial keeper file:
sudo debfoster -q
Force the system to conform to the keeper file
sudo debfoster -f
If you have some packages that you never want to uninstall and do not want debfoster to handle those packages, you can edit the keeper file and remove those packages from the list.
gksu gedit /var/lib/debfoster/keepers
To see is there is any orphaned package or dependencies files that need to be removed:
sudo debfoster
NB:- verified on ubuntu 8.04
Source: Debian 3.0r0 APT / Linux Dictionary V 0.16
http://www.tldp.org/LDP/Linux-Dictionary/html/index.html
http://maketecheasier.com/8-ways-to-maintain-a-clean-lean-ubuntu-machine/2008/10/07
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