Cannot upgrade from 19.4 to 20.4 since 19.4 is no longer supported
9901
How to upgrade from 18.10 to 19.10, using the command line?
12578
How do I upgrade to a newer version of Ubuntu?
8526
Upgrading from Ubuntu 16.04 to 18.04 broke the system completely!
87236
How to upgrade Ubuntu 12.04 to 13.10?
158735
How to update Wine to the latest version?
134080
Still can't upgrade? Is there a new delay?
42634
How do I upgrade to the development release (aka. Ubuntu+1)?
112955
How can I upgrade Ubuntu from 19.10 to 20.04 without losing packages?
65808
17.10 to 18.04 upgrade freezes during boot
342
Iphone 4 won't update past a 7.1.2
57183
Problem with upgrading 19.04 to 19.10 "UnicodeDecodeError: 'utf-8' codec can't decode byte 0x8b in position 1: invalid start byte
111573
What's the best way to re-enable PPAs/repos after an upgrade?
60659
Install newer package version from trusty-backports
15687
How do I resume a release upgrade?
40885
What should I do when I got the KEYEXPIRED error message after an apt-get update?
63176
How can I update to Ubuntu 21.04?
129101
Upgrading Ubuntu 9.04 to 9.10 when Update Manager doesn't let you