If you're trying to upgrade (which I recommend), you should have the option show in the update manager.
http://www.cyberciti.biz/faq/wp-content/uploads/2009/04/ubuntu-update- manager810.png ** Package changed: synaptic (Ubuntu) => firefox (Ubuntu) -- After loading the latest update today, the web browser will not launch https://bugs.launchpad.net/bugs/628989 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
