I try to upgrade to the latest release of Ubuntu (14.04 - Alpha).
I typed this in the Terminal:
$ sudo update-manager -d
After some checks, a popup appeared:
I clicked the Upgrade... button:
Preparing to upgrade was successful, but Setting new sofware channels fails:
How can this be fixed?
extras
entries from/etc/apt/sources.list
must be removed to be able to upgrade. So, I believe that the close votes can be removed...