404 not found errors for PPAs when I run sudo apt update
65
What can I do if a repository/PPA does not have a Release file?
60164
404 Could not find the controller
11671
"Unable to locate package" while trying to install packages with APT
95593
sudo apt-get update returns an error
83924
error while trying to sudo apt-get update GPG, no sign repository
36772
Is it possible to only allow specific packages updates from a PPA
47843
Upgraded to Chrome 61.0.3163 via ppa on Ubuntu 16.04 but it won't launch because NSS out of date
105208
How can I check if a PPA has packages for another Ubuntu version?
93246
How to resolve conflicting distributions in apt-get
131429
Why can't sudo find a command after I added it to PATH?
115648
dpkg exit with error "cannot scan updates directory `/var/lib/dpkg/updates/': No such file or directory", how to fix it?
132933
Is there a tool to update my PPA sources.list entries after upgrading?
69960
What is sudo apt-get -f install?
38110
Error sudo: add-apt-repository: command not found
130118
Ubunutu 18.04 Updates 404 error
136237
After update, get "error: file not found." followed by "grub rescue> _"
146324
phpmyadmin 404 error on fresh ubuntu 12.04 install