Problem upgrading to 20.04 from 16.04
211
Can I skip over releases when upgrading?
107009
ubuntu 18.04 apt-get upgrade problem "redirection loop encountered."
7580
How to safely upgrade from an older Ubuntu version to a newer one?
112955
How can I upgrade Ubuntu from 19.10 to 20.04 without losing packages?
86777
Distribution upgrade problem "No new release found"
56282
16.04 LTS upgrade alert- How to handle it?
67481
How to revert a do-release-upgrade?
129101
Upgrading Ubuntu 9.04 to 9.10 when Update Manager doesn't let you
19288
Update manager doesn't offer an upgrade to the new release
58888
Change Ubuntu 17.04 to Ubuntu 16.04.2 LTS
5316
Update from 14.04 to 16.04 failed with GPG error
52350
How should I fix my Homebrew installation after upgrading OS X?
155154
I am currently using 19.04 and I got "No new release found for 19.10"
116445
"Can't check signature: public key not found" while upgrading, why?
100494
Update Manager asking me to update kernel but apt-get upgrade does not?
65808
17.10 to 18.04 upgrade freezes during boot
144507
No facility exists in Update Manager to upgrade to a new version, why?