Upgrade from Ubuntu 11.04 to 13.04
211
Can I skip over releases when upgrading?
74990
Error while trying to upgrade from Ubuntu 18.04 to 18.10: "Please install all available updates for your release before upgrading."
120436
Point Release upgrade from 14.04.1 to 14.04.2?
11556
Can I smoothly upgrade from one LTS to next LTS release?
63514
How do I decide what version of Ubuntu to install?
8603
Upgrading my Wubi 11.04 to 11.10
48809
"The upgrade has aborted" error, how to proceed?
16050
Can I upgrade Xubuntu 18.04 32-bit?
126659
upgrade from 11.10 to 12.04 - No upgrade option available in update manager
4660
Should I be offered the option to upgrade to 18.04.1?
49889
Will there be data loss if I upgrade?
123413
Will apt-get dist-upgrade upgrade my system to a newer version?
10709
Can i upgrade ubuntu without losing my apps and files?
144172
How to upgrade to a point release from the same base release (12.04 to 12.04.03)
53938
Can I upgrade from Windows 7 32-bit to Windows 7 64 bit without reinstalling all of my software?
132533
back-up: which patitions to back-up before upgrading/reinstalling
12578
How do I upgrade to a newer version of Ubuntu?