How can I upgrade from Ubuntu 12.04 to 14.04?
12578
How do I upgrade to a newer version of Ubuntu?
72152
Upgrading 16.04 to 16.04.1
42634
How do I upgrade to the development release (aka. Ubuntu+1)?
19288
Update manager doesn't offer an upgrade to the new release
87236
How to upgrade Ubuntu 12.04 to 13.10?
24165
Upgrade to version newer than repositories
119595
Is it necessary to upgrade to 14.04 LTS or can I stand in 12.04 LTS forever with no problem?
119169
Should I upgrade to 14.04 LTS?
13107
How to install updates via command line?
35243
Is it safe to do-release-upgrade from 12.04.4 to 14.04.1?
98421
How will people upgrade from 12.10 to later releases after 13.04 is EOL?
113056
How to upgrade from 12.04 to 12.10 using CD?
63514
How do I decide what version of Ubuntu to install?
5882
How to upgrade Ubuntu from an ISO image
413
How do I install Ubuntu?
114305
On really old Ubuntu 6.06 - How to upgrade
144662
How to get Gnome 3.14 on ubuntu 14.04