upgrade from ubuntu 14.04 to 18.04
211
Can I skip over releases when upgrading?
15687
How do I resume a release upgrade?
147789
Updating core from 8.4.4 to 8.6.1
56150
Can't upgrade/update ubuntu 18.04 as apt/dpkg error is showing up
20399
How do I upgrade from 14.04 LTS to 16.04.1 LTS?
109902
Will I lose the already installed applications if I upgrade from ubuntu 18.04 to 20.04
5882
How to upgrade Ubuntu from an ISO image
43917
What is the difference between apt-get update and upgrade?
80794
Ubuntu 18.04 stuck at upgrading linux-header
144172
How to upgrade to a point release from the same base release (12.04 to 12.04.03)
56225
Do I have to download both the 14.04 and the 14.04.1 versions of ubuntu?
55211
Problem when upgrading to Ubuntu 14.04 from Ubuntu 12.04
49889
Will there be data loss if I upgrade?
128471
How do I update from 9.0.10 to 9.1.0?
35146
Will apt-get dist-upgrade upgrade my system to newer version?
12578
How do I upgrade to a newer version of Ubuntu?
5820
How to fix the “Unable to calculate upgrade” issue from command line when upgrading from 12.04 to 14.04?