Can't add PPA (cinnamon-stable)
3722
How do I install the Cinnamon Desktop?
43698
How does the PPA fit into the scenario of publishing an application to the Ubuntu Software Center?
28247
Google Chrome PPA upgrade invalid signature
111573
What's the best way to re-enable PPAs/repos after an upgrade?
40219
Remove all packages installed from a PPA?
7371
What are PPAs and how do I use them?
42792
Docker ppa package for Ubuntu 19.10
151656
Installing from source. How to resolve dependencies without destroying the package manager
115896
How can I install the $0 applications from the Ubuntu Software Center with apt-get?
6851
How do I install the ubuntu-restricted-extras package?
40335
Unity / Compiz problem after update from Xorg ppa
124619
Ubuntu 16: google-chrome-stable : Depends: libappindicator1 but it is not going to be installed
151066
Failed to fetch PPA Error (Deluge)
117852
"Package dependencies cannot be resolved" error when installing software
157379
Is there any limit to the number of PPA's I can add to the system? Why?
107786
PPA error while installing Albert application launcher in Ubuntu 18.04
11909
404 error with apt-get update, Don't have any PPA's