Unable to upgrade from 18.04 to 20.04
by CRDaniels from LinuxQuestions.org on (#5APC0)
When I try to upgrade to from 18.04 to 20.04 I get a message saying that my Authentication has failed and the problem might be either with my internet connection (since I can connect to email, youtube, etc. the internet connection is OK) or a problem with the server. I assume that means the Ubuntu server. How can I troubleshoot a problem connecting to that server?
