Hi, I have this problem also.
In my particular case, I'm want to install install gitk. Git is already installed. I search for gitk in Synaptic and nothing shows up. I searched for gitk in the PTS webpage mentioned in a previous post and it took me to the git (notice no K) entry (http://packages.qa.debian.org/g/git.html
) . There, I looked at the gitk binary link which is http://packages.debian.org/unstable/gitk.
I then looked at NOT-unstable versions (e.g. wheezy) but can't figure out how the information there can help me solve the problem.
I then tried downloading manually the gitk file which took me to this page http://packages.debian.org/wheezy/all/gitk/download
"If you are running Debian, it is strongly suggested to use a package manager like aptitude or synaptic to download and install packages, instead of doing so manually via this website.
You should be able to use any of the listed mirrors by adding a line to your /etc/apt/sources.list like this:
Replacing ftp.de.debian.org/debian with the mirror in question."
Instead of continuing with the manual dowanload/install, I tried adding a repository but even after adding I don't get any relevant result when searching for gitk in Synaptic.
My sources.list file looks like this:
debian main upstream import
testing main contrib non-free
testing/updates main contrib non-free
testing main non-free
The last two lines are the additional repositories I was talking about.
What's going on here? Why can't I find this package in the mint repositories? Why can't I find it in Debian repositories?