Ubuntu 15.04 to 16.04 Migration (skip 15.10)
1520
How to install software or upgrade from an old unsupported release?
9962
Why is one migration showing up as to a blank site?
33651
How to upgrade from Ubuntu 12.10 to 14.04
135547
Downgrading from OS X 10.9.2 to 10.9
101714
Is there any way to roll back the most recent upgrade?
31268
Revert to El Capitan
87236
How to upgrade Ubuntu 12.04 to 13.10?
31948
Roll back from OS X Mavericks ( or any newer OS) to Mountain Lion
98615
Is it possible to switch Ubuntu back to base-2?
36703
How do I upgrade from 12.10 to 13.04?
11556
Can I smoothly upgrade from one LTS to next LTS release?
82712
How to migrate MongoDB 2.4.14 file to MongoDB 3.6?
120436
Point Release upgrade from 14.04.1 to 14.04.2?
85532
Could normal users have an easier way to flag for migration?
62881
After upgrading from Ubuntu 14.04 LTS to 16.04 LTS, last process left cleaning, how to perform?
88086
How to install Ubuntu 16.10 without any gui?
10678
Upgrade to the specific php 7.1/7.2 from php 7.0 in Ubuntu 16.04