What is a safe way to upgrade over multiple releases without losing installed programs?
211
Can I skip over releases when upgrading?
12578
How do I upgrade to a newer version of Ubuntu?
123413
Will apt-get dist-upgrade upgrade my system to a newer version?
68584
On system restore, will I lose my software updates?
23713
What is "dist-upgrade" and why does it upgrade more than "upgrade"?
132533
back-up: which patitions to back-up before upgrading/reinstalling
130579
how to upgrade a single package in debian
54634
How can I upgrade from Windows 7 to Windows 8 and keep my files and applications?
15687
How do I resume a release upgrade?
86406
What are the options for managing multiple Ubuntu installations together and keeping them in same state
22615
How to upgrade shared library without crash?
49889
Will there be data loss if I upgrade?
102057
How to keep two versions of an app installed?
2136
How to roll back Ubuntu to a previous version?
11166
"Require Installation Of Untrusted Packages" while upgrading with the update manager
83074
Why does the separation of update and upgrade even exist?
10709
Can i upgrade ubuntu without losing my apps and files?