Thanks for your reply. I added the extras.ubuntu.com repository manually to the /etc/apt/sources.list. This is an ubuntu server system, not an ubuntu- desktop system. Following your question I tried to run synaptic, uncheck the extras repository, run an update, then check it back and run an update again. However, the error still occured. So, was I doing something wrong, or is this a bug? if there is a bug, then perhaps there is an error in the installer of the ubuntu server, not the desktop one, which may explain how the bug remained unnoticed so far.
Your fix involving requesting the key from keyserver.ubuntu.com worked and now I can run apt-get update with no error messages. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/884668 Title: sudo apt-get update fails to update extras repository because of unavailable public key To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt/+bug/884668/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
