upgrading from ubuntu 17.04 to 18.04
211
Can I skip over releases when upgrading?
125976
What Happens When I Upgrade Ubuntu?
112955
How can I upgrade Ubuntu from 19.10 to 20.04 without losing packages?
24165
Upgrade to version newer than repositories
55211
Problem when upgrading to Ubuntu 14.04 from Ubuntu 12.04
154526
How to upgrade to GNOME 3.30 on Ubuntu 18.04.1
112536
Upgrading Ubuntu chroot environment?
68120
Will upgrading Windows 8 to 8.1 affect Ubuntu?
5882
How to upgrade Ubuntu from an ISO image
153774
Upgrade to Ubuntu 13.10 from ISO image
132739
Will Ubuntu 18.04 LTS still support Upstart or do we have to change to systemd?
43648
Why isn't an upgrade to 20.04 from 18.04 available yet?
63278
Update Linux Subsystem on Windows (Ubuntu) to 16.04
2136
How to roll back Ubuntu to a previous version?
151605
upgrading from 15.10 to 16.04 apt not installed
114305
On really old Ubuntu 6.06 - How to upgrade
87236
How to upgrade Ubuntu 12.04 to 13.10?