How to upgrade to a point release from the same base release (12.04 to 12.04.03)
34999
What are point releases in LTS versions?
80233
Upgrade to 20.04 from 19.10 isn't available
111573
What's the best way to re-enable PPAs/repos after an upgrade?
7580
How to safely upgrade from an older Ubuntu version to a newer one?
13107
How to install updates via command line?
14631
Can someone clarify Ubuntu (Debian) dist-upgrade for me?
64607
How can I update all Snap packages?
83960
How do I change my update server in Ubuntu 18.04?
118307
Why does upgrade from 12.04 to 12.10 using a CD/DVD still require download?
5820
How to fix the “Unable to calculate upgrade” issue from command line when upgrading from 12.04 to 14.04?
87236
How to upgrade Ubuntu 12.04 to 13.10?
35146
Will apt-get dist-upgrade upgrade my system to newer version?
52190
How and when is old-releases.ubuntu.com updated?
33651
How to upgrade from Ubuntu 12.10 to 14.04
147789
Updating core from 8.4.4 to 8.6.1
147458
How can I duplicate my existing software packages on a new system?
60659
Install newer package version from trusty-backports