W: The repository 'cdrom://Xubuntu 16.04 LTS _Xenial Xerus_ - Release
10193
Failed to download repository information due to missing CDROM
116858
How to find the list of all available packages along with the lastest version number available in the repositories?
122274
Release file for http://archive.ubuntu.com/ubuntu/dists/bionic-updates/InRelease is not valid yet
51350
While updating the ubuntu 16.04 does not have a Release file Error
79030
Installing PHP 5.6 on Xenial (16.04)
92807
There's an issue with an Alpha/Beta Release of Ubuntu, what should I do?
80221
What is the meaning of the XubuntuY string in Ubuntu package names?
140850
Why does do-release-upgrade on Xubuntu running version 18.04 not offer to update to 20.04.1?
339
How to resolve "Failed to download repository information"?
119943
Where can I find a repository for older unsupported releases?
76117
Can my xubuntu installation be converted to standard Ubuntu?
108758
How to reset the Xorg / xserver?
1159
Apt/Synaptic needs to reinstall package but can't find the archive for it
112879
W: The repository 'http://download.fpcomplete.com/ubuntu yakkety Release' is not signed
2578
Where is the downloaded package files directory?
4450
How can I reproduce the error "package... needs to be reinstalled, but I can't find an archive for it" for testing?
154420
"Failed to download repository information" error