Revert upgrade in Ubuntu 12.04
39823
How do I free up disk space?
83960
How do I change my update server in Ubuntu 18.04?
10709
Can i upgrade ubuntu without losing my apps and files?
110148
Why does `do-release-upgrade` skip a version?
35476
How do I revert a Git repository to a previous commit?
98421
How will people upgrade from 12.10 to later releases after 13.04 is EOL?
35146
Will apt-get dist-upgrade upgrade my system to newer version?
35093
Upgrading from the command line?
69200
How do I reinstall Ubuntu Software in Ubuntu 20.04 LTS version?
72297
are there any way to find the true package which I want to uninstall on Ubuntu?
106931
How to undo sudo add-apt-repository?
49161
Upgrade manager wants me to do a partial upgrade
105231
How to downgrade a package using dpkg
71449
How can I revert a config file back to the originally installed version after I have edited it?
7521
Revert Android Update 4.0 to 3.0/3.2
211
Can I skip over releases when upgrading?
26944
Undoing the Last Installed Windows Updates via Command Line