difficulty upgrading distribution from yakkety/zesty
1520
How to install software or upgrade from an old unsupported release?
153266
errors upgrading from 14.04 to 16.04 about Unknown Multi-Arch type for compiz, libkf5akonadisearch-bin packages
140470
How do I update kernel to the latest mainline version?
23096
How to remove obsolete packages after failed release upgrade via do-release-upgrade on Ubuntu?
118978
Not all updates can be installed: partial upgrade
29191
Upgrade to 18.04 from 17.10
101714
Is there any way to roll back the most recent upgrade?
120161
Ubuntu 19.04 problems install upgrades
20442
How should I deal with "package 'xxx' is not available (for R version x.y.z)" warning?
76905
Failure [INSTALL_FAILED_ALREADY_EXISTS] when I tried to update my application
12592
Unable to 'apt-get dist-upgrade' due to appstreamcli database error
80233
Upgrade to 20.04 from 19.10 isn't available
421
How do I update a Drupal distribution to a newer version?
77705
Unable to upgrade in ubuntu
117112
Why isn't Ubuntu moving its repositories to old-releases anymore?
66220
How can I instruct yum to install a specific version of package X?
100494
Update Manager asking me to update kernel but apt-get upgrade does not?