Ubuntu – How to get a list of obsolete packages

package-management

I'm trying to figure out a way to get a list of the packages that are no longer available in the repositories that I have enabled. This workstation has been through quite a few versions of Ubuntu and has had many 3rd party repositories added and removed. I'd like to get a list of software that I have from these removed repositories, so I can clean it up or add back the appropriate repositories.

Best Answer

aptitude search '~o'

Aptitude has some very powerful searching available. Unfortunately the syntax is a bit unwieldy and you have to dig past the manpage to find the documentation, but its worth it.

apt-show-versions can also be helpful:

apt-show-versions | grep 'No available version'
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