How can I undo adding a PPA and installing packages from it?
10101
How can PPAs be removed?
127669
How can I install the "third party" software option after I've skipped it in the installer?
102559
How to install package from newer distribution?
76883
How can I remove gpg key that I added using apt-key add -?
140055
Where does pp (PAR) unpack add (-a) files?
151656
Installing from source. How to resolve dependencies without destroying the package manager
32200
How do I downgrade a package?
152823
PPAs will not install "sudo: add-apt-repository: command not found"
104908
How to delete History of installed packages
158191
Is there a way to install and remove packages in a single yum command?
3298
How do I resolve unmet dependencies after adding a PPA?
45526
How can I install packages without starting their associated services?
78011
Unable to install package post adding ppa
30645
How to install (old) packages for Ubuntu 9.04?
9896
How do I get and modify the source code of packages installed through apt-get?
79163
Sources missing in /etc/apt/sources.list, how do I get them back?
26944
Undoing the Last Installed Windows Updates via Command Line