Upgrade from Ubuntu 11.10 to 14.04
211
Can I skip over releases when upgrading?
105335
How do I upgrade my Ubuntu server from one LTS version to another? Is this safe?
129101
Upgrading Ubuntu 9.04 to 9.10 when Update Manager doesn't let you
43778
Is it possible to "upgrade" from a 32bit to a 64bit installation?
102559
How to install package from newer distribution?
112955
How can I upgrade Ubuntu from 19.10 to 20.04 without losing packages?
113056
How to upgrade from 12.04 to 12.10 using CD?
90512
Upgrading from 12.10 WUBI install to 13.04
56225
Do I have to download both the 14.04 and the 14.04.1 versions of ubuntu?
11556
Can I smoothly upgrade from one LTS to next LTS release?
120436
Point Release upgrade from 14.04.1 to 14.04.2?
59088
How to upgrade to a newer release of Ubuntu using the Live CD?
43279
Alternative Method to Acquire El Capitan Upgrade
58979
How can I upgrade Ubuntu LTS to the next one offline?
63514
How do I decide what version of Ubuntu to install?
10709
Can i upgrade ubuntu without losing my apps and files?
77692
How do I update Drush to the latest available version?