Upgrading from 12.10 to 13.10
211
Can I skip over releases when upgrading?
113056
How to upgrade from 12.04 to 12.10 using CD?
20751
Problem upgrading Ubuntu 9.10
15687
How do I resume a release upgrade?
142700
What's the difference between 12.04 and 12.10?
119169
Should I upgrade to 14.04 LTS?
11166
"Require Installation Of Untrusted Packages" while upgrading with the update manager
11556
Can I smoothly upgrade from one LTS to next LTS release?
12614
Upgrade problem
43917
What is the difference between apt-get update and upgrade?
67481
How to revert a do-release-upgrade?
35146
Will apt-get dist-upgrade upgrade my system to newer version?
59088
How to upgrade to a newer release of Ubuntu using the Live CD?
85946
Upgrading Python
2136
How to roll back Ubuntu to a previous version?
128471
How do I update from 9.0.10 to 9.1.0?
42634
How do I upgrade to the development release (aka. Ubuntu+1)?