ubuntu upgrade from 14 LTS to 15.04
211
Can I skip over releases when upgrading?
59088
How to upgrade to a newer release of Ubuntu using the Live CD?
113942
Is it possible to install Python 3.x in 14.04 LTS, or upgrade from Python 2.7.6 to 2.7.8?
107548
Where can I download Ubuntu 16.04?
87297
Does upgrading Ubuntu respect my existing partitions?
124563
Will Ubuntu minimal cd install ubuntu-desktop on release upgrade or just installed packages?
69200
How do I reinstall Ubuntu Software in Ubuntu 20.04 LTS version?
72152
Upgrading 16.04 to 16.04.1
13970
Why am I not getting the Ubuntu 18.04 upgrade?
63278
Update Linux Subsystem on Windows (Ubuntu) to 16.04
35093
Upgrading from the command line?
147789
Updating core from 8.4.4 to 8.6.1
105335
How do I upgrade my Ubuntu server from one LTS version to another? Is this safe?
1520
How to install software or upgrade from an old unsupported release?
153774
Upgrade to Ubuntu 13.10 from ISO image
115421
Ubuntu 13.10 to 14.04 Lts does not upgrade, keeps showing error
16050
Can I upgrade Xubuntu 18.04 32-bit?