Ubuntu 14.04 and 12.04
12578
How do I upgrade to a newer version of Ubuntu?
119474
Installing QGIS on Ubuntu 14.04?
52190
How and when is old-releases.ubuntu.com updated?
119595
Is it necessary to upgrade to 14.04 LTS or can I stand in 12.04 LTS forever with no problem?
31284
Installed 14.04 on a non-PAE (Pentium-M), but now I can't update ("This kernel does not support a non-PAE CPU.")
55211
Problem when upgrading to Ubuntu 14.04 from Ubuntu 12.04
88216
What's the difference between installing and trying Ubuntu?
54223
On 14.04, my kernel version is 3.11.0-18?
70366
Will Ubuntu support my machine features?
18635
Why is my Apache not working after upgrading to Ubuntu 14.04?
2136
How to roll back Ubuntu to a previous version?
148844
Can all flavours of Ubuntu 16.04 run the same programs?
119169
Should I upgrade to 14.04 LTS?
43022
How do I cross-compile my application for Ubuntu 12.04 armhf architecture on a Ubuntu 12.04 i386 host?
18514
Where can I find the status of the released versions of Ubuntu?
144662
How to get Gnome 3.14 on ubuntu 14.04
134786
Why doesn't Ubuntu ship an application, or the latest versions of some applications?