It’s really very easy to upgrade from Fedora 15 to Fedora 16 and this tutorial describes in simple step-by-step procedure on how to upgrade from Fedora 15 to Fedora 16 (both Desktop and Server).
1. Active Internet Connection by any means
2. Super user or Root’s password.
Important Note: If you gain root access using “su” command, ignore the keyword “sudo“ before every command mentioned in the following steps. If you are not gaining Root access and performing the upgrade as normal user use the command as it is mentioned.
“sudo“ works only if the user has been added to perform Administrative privileges at the time of installation or it can be performed manually after installation.