Kubuntu refuses to upgrade "E: The repository 'http://ppa.launchpad.net/gezakovacs/ppa/ubuntu disco Release' does not have a Release file."
65
What can I do if a repository/PPA does not have a Release file?
135383
Unable to update my system Ubuntu13.04: Getting message - requires installation of untrusted packages
80899
"no public key available" on apt-get update
59088
How to upgrade to a newer release of Ubuntu using the Live CD?
138125
dpkg: error: cannot scan updates directory `/var/lib/dpkg/updates/'
8525
Error Updating: izx/askubuntu/ubuntu xenial Release' does not have a Release file
80233
Upgrade to 20.04 from 19.10 isn't available
64509
Can't update from official repositories [Error 409]
117112
Why isn't Ubuntu moving its repositories to old-releases anymore?
44209
Problem with update-manager: No module named 'apt_pkg' in Ubuntu 13.10, having installed Python 3.4 on /usr/local/lib
48809
"The upgrade has aborted" error, how to proceed?
59559
How to upgrade Git on Ubuntu Hardy?
122274
Release file for http://archive.ubuntu.com/ubuntu/dists/bionic-updates/InRelease is not valid yet
2236
Why don't the Ubuntu repositories have the latest versions of software?
91491
How can I get "delta" packages to optimize apt-get upgrade downloads?
107009
ubuntu 18.04 apt-get upgrade problem "redirection loop encountered."
4305
How do I fix a "Problem with MergeList" or "status file could not be parsed" error when trying to do an update?