How to add Debian experimental repo to Ubuntu?

Solution 1:

The Experimental repository is a Debian repository, not an Ubuntu repository.

I would NOT RECOMMEND using the Experimental repository as a source for anything. It has a lot of packages which can break everything, hence the name "Experimental".

CUPS 1.6.1-2 exists in Raring. Once raring is released, you can use Raring.

Solution 2:

Edit sources.list: '/etc/apt/sources.list'

Add the repo URL like below. 'deb http://dev.zenoss.org/deb main stable'

Solution 3:

You probably shouldn't mix Debian and Ubuntu repositories:

Mixing Debian and Ubuntu repositories will likely render your system unmaintainable. The package dependencies may introduce contradictions which leads to a deadlock situation.

Please read further in the following answers: https://askubuntu.com/a/240654/58950 and https://askubuntu.com/a/264766/58950