Failed to load the package list This is a serious problem. Try again later. If this problem appears again, please report an error to the developers. Click details, which says: E:Type 'http://ppa.launchpad.net/madman2k/ubuntu' is not known on line 61 in source list /etc/apt/sources.list
Tried this solution:
sudo rm /var/lib/apt/lists/* -vf sudo apt-get update
However, when entering the first command, it hits back an error:
rm: cannot remove `/var/lib/apt/lists': Is a directory
Some people are suggesting that I change settings in the update manager. I unfortunately can't, since the update manager closes each time I get the error.
Any other way to remove that package?