Can't seem to upgrade from Ubuntu LTS 14.04 to 16.04
12578
How do I upgrade to a newer version of Ubuntu?
105335
How do I upgrade my Ubuntu server from one LTS version to another? Is this safe?
2670
Why is "No new release found" when upgrading from a LTS to the next?
16837
Unable to upgrade from 14.04 to 14.10 "Cannot Calculate Upgrades"
69200
How do I reinstall Ubuntu Software in Ubuntu 20.04 LTS version?
119169
Should I upgrade to 14.04 LTS?
151605
upgrading from 15.10 to 16.04 apt not installed
12534
14.04 --> 16.04 failed; apt (>= 1.0.1ubuntu2.13)' is not installed
117112
Why isn't Ubuntu moving its repositories to old-releases anymore?
56150
Can't upgrade/update ubuntu 18.04 as apt/dpkg error is showing up
31892
New "Ubuntu Software" not working (16.04)
113942
Is it possible to install Python 3.x in 14.04 LTS, or upgrade from Python 2.7.6 to 2.7.8?
119595
Is it necessary to upgrade to 14.04 LTS or can I stand in 12.04 LTS forever with no problem?
5316
Update from 14.04 to 16.04 failed with GPG error
87236
How to upgrade Ubuntu 12.04 to 13.10?
74990
Error while trying to upgrade from Ubuntu 18.04 to 18.10: "Please install all available updates for your release before upgrading."
12614
Upgrade problem