I'm using Ubuntu 12.04, suddenly Ubuntu update manager stopped updating.
At first I thought that, it's a problem with my Internet connection, but I was wrong, because downloading, browsing everything is perfect.
Then I've tried with
Code:
sudo rm -vf /var/lib/part/lists/partial/*
to remove my previous lists and update with a new one. Unfortunately, no luck with this, same problem continuing.
Moreover, recently I've tried to add Cinnamon PPA, but it failed to connect with the key server.
Then I've pinged to archive.ubuntu.com, that's perfectly OK.
I don't know what's the problem. Please help anyone.
Thanks in advance.
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