how to upgrade from ubuntu 15.04 to 15.10?
42634
How do I upgrade to the development release (aka. Ubuntu+1)?
21323
Where can I download the latest release of Ubuntu?
2136
How to roll back Ubuntu to a previous version?
112955
How can I upgrade Ubuntu from 19.10 to 20.04 without losing packages?
88086
How to install Ubuntu 16.10 without any gui?
101714
Is there any way to roll back the most recent upgrade?
16837
Unable to upgrade from 14.04 to 14.10 "Cannot Calculate Upgrades"
128471
How do I update from 9.0.10 to 9.1.0?
13970
Why am I not getting the Ubuntu 18.04 upgrade?
78587
How do I update core to 8.5?
1520
How to install software or upgrade from an old unsupported release?
87236
How to upgrade Ubuntu 12.04 to 13.10?
36986
Ubuntu kernel not upgrading with upgrade to 15.10
67359
Upgrade to the latest PHP version in Ubuntu
75798
How to upgrade to the latest GNOME version?
20751
Problem upgrading Ubuntu 9.10
144172
How to upgrade to a point release from the same base release (12.04 to 12.04.03)