I'm looking for a command that starts verbose terminal version of what can I see after clicking Upgrade in update manager:

What command(s) can do that?
I'm looking for a command that starts verbose terminal version of what can I see after clicking Upgrade in update manager:

What command(s) can do that?
do-release-upgrade is the command-line equivalent...
... but if you're upgrading from 10.10 (as the screenshot suggests), you might do best to just reinstall 12.04.5 or 14.04. You'll save a ton of bandwidth and it'll almost certainly take less time.