do-release-upgrade from local mirror does not work
1520
How to install software or upgrade from an old unsupported release?
150518
Version error when uploading Change Set
127766
how to upgrade my Debian package with minor changes
68722
How can I make my local repository available for git-pull?
122274
Release file for http://archive.ubuntu.com/ubuntu/dists/bionic-updates/InRelease is not valid yet
112955
How can I upgrade Ubuntu from 19.10 to 20.04 without losing packages?
65
What can I do if a repository/PPA does not have a Release file?
13107
How to install updates via command line?
43236
Should I upgrade when a development branch becomes stable?
103103
How do I switch to a closer Ubuntu mirror?
80489
Setup Debian Mirrors after Installation
87680
How to reverse '-proposed' channel package upgrade?
29343
Get a local copy of a GitHub repo, track changes and push updates back to the remote
45703
How do I change mirrors in Ubuntu Server from regional to main?
66915
How to request a package upgrade in the next Ubuntu release
89856
How to resume the interrupted upgrade from 14.10 to 15.04?
63320
Ubuntu repository does not have a Release file