I'm trying to upgrade my 13.04 to 13.10 in anticipation to 14.04. However, the
dist-upgrade fails as there is a 404 on a repository. That repository is the "natty-backports". It's normal, as it's very old.
However, I cannot find any connections to that repository. When I
/etc/apt/sources.list it isn't there. When I look through the
sources.list.d/ directory files, it also doesn't show up there. When I
CTRL+F "natty" in the Software Center sources window, it doesn't show up. It's like a ghost repository.
I tried doing a
sudo apt-get clean && sudo apt-get update, but that didn't help either. When I do these commands, I make sure the Software Center is closed.
Is there some other directory/file
apt-get gets its sources from?