How can I remove all PPA?
120
How do I restore the default repositories?
5520
How to remove Postgres from my installation?
152897
Is it safe to remove ubuntu-desktop package?
153923
Completely Remove LXDE/Lubuntu Desktop Environment
7371
What are PPAs and how do I use them?
88127
How to remove Apple System Apps
8282
Are PPAs safe to add to my system and what are some "red flags" to watch out for?
36938
How to remove an uninstalled package's dependencies?
39582
Difference between "ppa-purge" and "add-apt-repository -r"?
69765
How do I cherry pick packages from a PPA?
112870
How can I remove all build dependencies for a particular package?
106685
How to remove all files from a directory?
67465
How do you completely remove ubuntu-desktop along with all installed packages with it?
6945
How to add a PPA on a server?
57082
How can you remove Unity?
2018
How to remove everything Ubuntu One-related?
30004
How can I uninstall software?