I'm actually trying to upgrade my Ubuntu 11.04 server to 12.04, but I have to go through 11.10 first, right? Well, do-release-upgrade is failing miserably. Here are some representative screenshots: Screenshot 1 Screenshot 2 Screenshot 3 Screenshot 4 And finally... Yeah. I found this question, which appears to have similar errors, but I've tried all of the suggestions given there and nothing has changed. I tried running apt-get dist-upgrade; it churned for a while and eventually came back with "Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?" Ran apt-get update and got much the same kinds of error messages I got from do-release-upgrade. Any ideas/suggestions/solutions? Should I try downloading & upgrading from the CD instead? I'm glad to provide any further information I've forgotten.