Update Ubuntu from 13.04 to 13.10
7580
How to safely upgrade from an older Ubuntu version to a newer one?
12164
How do I update my TeX distribution?
7095
How do I install different (upgrade or downgrade) PHP version in still supported Ubuntu release?
148808
Update from Mac OS X 10.6.8 to the newest version
13107
How to install updates via command line?
128253
do i need to reinstall all my softwares after upgrading ubuntu 12.10 to 13.04?
21524
I want to Change ubuntu 14.04 from 64 bit to 32 bit
16428
Upgrade to the latest PHP version in ubuntu 16.04
32829
One single command to update everything in Ubuntu?
75798
How to upgrade to the latest GNOME version?
11556
Can I smoothly upgrade from one LTS to next LTS release?
2136
How to roll back Ubuntu to a previous version?
52190
How and when is old-releases.ubuntu.com updated?
147789
Updating core from 8.4.4 to 8.6.1
114305
On really old Ubuntu 6.06 - How to upgrade
121201
Why can't I update applications without upgrading the whole OS?
67481
How to revert a do-release-upgrade?