upgrade Ubuntu 16.04 without losing data
11556
Can I smoothly upgrade from one LTS to next LTS release?
143331
Can I upgrade the CPU without reinstalling my Xen/Ubuntu system?
12578
How do I upgrade to a newer version of Ubuntu?
137277
Run a command before & after ubuntu apt upgrade & unattended-upgrades
29358
How do I replace Windows with Ubuntu, yet keep my data?
97346
Is it possible to skip releases during an upgrade?
114305
On really old Ubuntu 6.06 - How to upgrade
25951
Does upgrading alter partitions?
5882
How to upgrade Ubuntu from an ISO image
33437
Can I backup my entire Ubuntu installation to ISO DVD?
57496
Re-install Ubuntu without losing data in home folder
15687
How do I resume a release upgrade?
35973
Ways to update Ubuntu (debian-based distros) offline
9901
How to upgrade from 18.10 to 19.10, using the command line?
122693
How can I upgrade Mac OS without the administrator password?
109902
Will I lose the already installed applications if I upgrade from ubuntu 18.04 to 20.04
16050
Can I upgrade Xubuntu 18.04 32-bit?