How to downgrade from ubuntu 19.10 to 18.04
2136
How to roll back Ubuntu to a previous version?
7580
How to safely upgrade from an older Ubuntu version to a newer one?
75798
How to upgrade to the latest GNOME version?
149044
Can I downgrade to an earlier version of Android after installing an OTA update?
211
Can I skip over releases when upgrading?
128691
How to downgrade PHP from 5.5.9 to 5.4 in Ubuntu 14.04 (Installed with LAMP)
69200
How do I reinstall Ubuntu Software in Ubuntu 20.04 LTS version?
25919
How to replace an old version of Ubuntu with a newer one from USB/DVD?
59088
How to upgrade to a newer release of Ubuntu using the Live CD?
23096
How to remove obsolete packages after failed release upgrade via do-release-upgrade on Ubuntu?
98421
How will people upgrade from 12.10 to later releases after 13.04 is EOL?
129101
Upgrading Ubuntu 9.04 to 9.10 when Update Manager doesn't let you
50810
No upgrade available for 19.04 from 18.10
119971
Install 17.10 on 32 bit machine
102559
How to install package from newer distribution?
43778
Is it possible to "upgrade" from a 32bit to a 64bit installation?
24165
Upgrade to version newer than repositories