Update Manager did it on its own. It failed to download certain things. It showed an error message that I don't understand at all. Would someone kindly tell me what I should do, please?
This is the error message:-
W:GPG error: http://download.opensuse.org ./ Release: The following signatures were invalid: KEYEXPIRED 1332869210, W:Failed to fetch http://extras.ubuntu.com/ubuntu/dist...source/Sources 404 Not Found
, W:Failed to fetch http://extras.ubuntu.com/ubuntu/dist...-i386/Packages 404 Not Found
, E:Some index files failed to download. They have been ignored, or old ones used instead.
This is the error message:-
W:GPG error: http://download.opensuse.org ./ Release: The following signatures were invalid: KEYEXPIRED 1332869210, W:Failed to fetch http://extras.ubuntu.com/ubuntu/dist...source/Sources 404 Not Found
, W:Failed to fetch http://extras.ubuntu.com/ubuntu/dist...-i386/Packages 404 Not Found
, E:Some index files failed to download. They have been ignored, or old ones used instead.