Why doesn't update-manager allow me to upgrade distribution?
129101
Upgrading Ubuntu 9.04 to 9.10 when Update Manager doesn't let you
1520
How to install software or upgrade from an old unsupported release?
157289
Why use apt-get upgrade instead of apt-get dist-upgrade?
117623
Why do I need root-privileges to update my package manager's package list?
118978
Not all updates can be installed: partial upgrade
144172
How to upgrade to a point release from the same base release (12.04 to 12.04.03)
13970
Why am I not getting the Ubuntu 18.04 upgrade?
11166
"Require Installation Of Untrusted Packages" while upgrading with the update manager
30754
Cannot update: "No available releases found"
64509
Can't update from official repositories [Error 409]
100494
Update Manager asking me to update kernel but apt-get upgrade does not?
135383
Unable to update my system Ubuntu13.04: Getting message - requires installation of untrusted packages
421
How do I update a Drupal distribution to a newer version?
12164
How do I update my TeX distribution?
64558
What does `do-release-upgrade` really do?
127766
how to upgrade my Debian package with minor changes
47010
How can update-manager update without the root password?