Upgrade from Ubuntu 19.04 to 20.04
1520
How to install software or upgrade from an old unsupported release?
119920
Failed upgrade from Ubuntu 19.10 to 20.04 "Please update the microcode"
33540
How can I switch a 32-bit installation to a 64-bit one?
118307
Why does upgrade from 12.04 to 12.10 using a CD/DVD still require download?
119971
Install 17.10 on 32 bit machine
12578
How do I upgrade to a newer version of Ubuntu?
42634
How do I upgrade to the development release (aka. Ubuntu+1)?
33651
How to upgrade from Ubuntu 12.10 to 14.04
58979
How can I upgrade Ubuntu LTS to the next one offline?
68597
Will upgrading Ubuntu remove installed software?
211
Can I skip over releases when upgrading?
74079
How to Upgrade Ubuntu 12.04.2, 12.04.3 to 12.04.4, the next Hardware Enablement Stack?
35093
Upgrading from the command line?
15687
How do I resume a release upgrade?
21323
Where can I download the latest release of Ubuntu?
83960
How do I change my update server in Ubuntu 18.04?
101714
Is there any way to roll back the most recent upgrade?