How do I revert back from sudo add-apt-repository ppa:xorg-edgers/ppa?
10101
How can PPAs be removed?
109277
Can't Add ppa:x2go/stable
113026
What happened to /etc/apt/apt.conf?
8252
Accidentally deleted 'sudo'
100700
How to remove the Unity Amazon package in 16.04?
94228
What commands (exactly) should replace the deprecated apt-key?
67481
How to revert a do-release-upgrade?
40335
Unity / Compiz problem after update from Xorg ppa
103004
What environment do I get with sudo?
134829
Cannot install Xtreme Download Manager on Ubuntu 17.10 from NoobsLab PPA
118864
What exactly does sudo apt-get -f install do?
154520
How to reinstall apt on Debian?
80258
Unable to open any graphical app with "sudo"
127668
"Unable to locate package sudo" when i try to install sudo on new Debian
76883
How can I remove gpg key that I added using apt-key add -?
99175
How to "undo" SetOptions (restore defaults)?
74838
Lost/Deleted dpkg (package manager for Debian). How do I get it back?