How do I go back to 12.04?
2136
How to roll back Ubuntu to a previous version?
34340
Removed python from my install, how do I get it back?
7521
Revert Android Update 4.0 to 3.0/3.2
69200
How do I reinstall Ubuntu Software in Ubuntu 20.04 LTS version?
142700
What's the difference between 12.04 and 12.10?
41495
How do I completely remove Ubuntu 12.04 on my Mac?
71449
How can I revert a config file back to the originally installed version after I have edited it?
31506
How do I update Ubuntu manually?
119334
How to set Python back to the original version
80233
Upgrade to 20.04 from 19.10 isn't available
35243
Is it safe to do-release-upgrade from 12.04.4 to 14.04.1?
25295
How do I downgrade Minecraft to play on a server running an older version?
23582
How to revert to GNOME Classic Desktop?
114305
On really old Ubuntu 6.06 - How to upgrade
35093
Upgrading from the command line?
211
Can I skip over releases when upgrading?
62279
18.04: How to get Wayland back after upgrade to 18.04?