do-release-upgrade failing on Ubuntu 16.04 LTS - says: No new release found
120
How do I restore the default repositories?
84537
Using dpkg to install upgrade and dist-upgrade packages
151605
upgrading from 15.10 to 16.04 apt not installed
5820
How to fix the “Unable to calculate upgrade” issue from command line when upgrading from 12.04 to 14.04?
97346
Is it possible to skip releases during an upgrade?
115421
Ubuntu 13.10 to 14.04 Lts does not upgrade, keeps showing error
59559
How to upgrade Git on Ubuntu Hardy?
120436
Point Release upgrade from 14.04.1 to 14.04.2?
59088
How to upgrade to a newer release of Ubuntu using the Live CD?
122274
Release file for http://archive.ubuntu.com/ubuntu/dists/bionic-updates/InRelease is not valid yet
22164
Problem with sudo apt get update: The repository cdrom... does not have a Release file
39053
16.04 apt-get update hangs
103929
sudo apt upgrade error 18.04 (Broken Packages)
83216
apt get update missing release file
94171
Why Does Software Updater Say No updates Available, but apt-get upgrade Shows updates available?
9322
Software Updater Issue 16.04
126659
upgrade from 11.10 to 12.04 - No upgrade option available in update manager