Can't upgrade from 19.04 to 20.04
211
Can I skip over releases when upgrading?
59088
How to upgrade to a newer release of Ubuntu using the Live CD?
107009
ubuntu 18.04 apt-get upgrade problem "redirection loop encountered."
121201
Why can't I update applications without upgrading the whole OS?
64509
Can't update from official repositories [Error 409]
127766
how to upgrade my Debian package with minor changes
11166
"Require Installation Of Untrusted Packages" while upgrading with the update manager
69200
How do I reinstall Ubuntu Software in Ubuntu 20.04 LTS version?
16050
Can I upgrade Xubuntu 18.04 32-bit?
115421
Ubuntu 13.10 to 14.04 Lts does not upgrade, keeps showing error
149279
Why can not upgrade texlive2016 to texlive2017 on windows
4305
How do I fix a "Problem with MergeList" or "status file could not be parsed" error when trying to do an update?
128471
How do I update from 9.0.10 to 9.1.0?
65099
Unable to install any updates through update manager/apt-get upgrade
64558
What does `do-release-upgrade` really do?
41519
What can I do if a package is not available on the newest version of Ubuntu (18.04) but is available on older versions?
57183
Problem with upgrading 19.04 to 19.10 "UnicodeDecodeError: 'utf-8' codec can't decode byte 0x8b in position 1: invalid start byte