Unable to upgrade to 18.04 (no new release found)
2670
Why is "No new release found" when upgrading from a LTS to the next?
121201
Why can't I update applications without upgrading the whole OS?
17645
Unable to upgrade pip
158735
How to update Wine to the latest version?
72152
Upgrading 16.04 to 16.04.1
73357
Every package "has no installation candidate"
80794
Ubuntu 18.04 stuck at upgrading linux-header
77692
How do I update Drush to the latest available version?
1520
How to install software or upgrade from an old unsupported release?
28650
`apt-get update` cannot find Ubuntu servers
24165
Upgrade to version newer than repositories
123455
Unable to update Node JS - keeps returning to old version [Ubuntu 15.04]
140850
Why does do-release-upgrade on Xubuntu running version 18.04 not offer to update to 20.04.1?
9901
How to upgrade from 18.10 to 19.10, using the command line?
3523
What does "Package  has no installation candidate" mean?
12578
How do I upgrade to a newer version of Ubuntu?
76241
"no public key available" while upgrading using update-manager