Change Ubuntu 17.04 to Ubuntu 16.04.2 LTS
2136
How to roll back Ubuntu to a previous version?
2702
How to customize the Ubuntu Live CD?
69200
How do I reinstall Ubuntu Software in Ubuntu 20.04 LTS version?
33228
Change Linux Mint to Ubuntu
50553
Can I mix sources from different ubuntu versions?
132293
If I can, how do I install Ubuntu from Ubuntu?
5882
How to upgrade Ubuntu from an ISO image
16050
Can I upgrade Xubuntu 18.04 32-bit?
105335
How do I upgrade my Ubuntu server from one LTS version to another? Is this safe?
133002
Can I install two Ubuntu versions on the same machine?
147789
Updating core from 8.4.4 to 8.6.1
41825
How to downgrade from 64-bit to 32-bit
1520
How to install software or upgrade from an old unsupported release?
10558
How do I change Ubuntu's GUI?
68096
Can I change my Ubuntu Desktop into a different flavour (like Kubuntu)?
12577
How can I customize the Ubuntu installer?
99169
How to install previous Firefox version?