Is it better do upgrade system from existing Ubuntu installation, or to install a fresh version?
14820
Is a clean install better than upgrading?
129223
Ubuntu upgrade from 17.04 to 18.04
143331
Can I upgrade the CPU without reinstalling my Xen/Ubuntu system?
70726
Windows (7, 8, 10) - Is a clean install better than an upgrade and if so why? (be specific)
49161
Upgrade manager wants me to do a partial upgrade
43917
What is the difference between apt-get update and upgrade?
84053
Is upgrading from LTS to LTS as reliable as doing a fresh install?
1520
How to install software or upgrade from an old unsupported release?
119595
Is it necessary to upgrade to 14.04 LTS or can I stand in 12.04 LTS forever with no problem?
98956
Reasons why not to update an Ubuntu version to a newer/older kernel version
90705
Minimal system or minimal virtual machine on install?
16753
Why should I regularly run 'apt-get update' and similar commands?
123413
Will apt-get dist-upgrade upgrade my system to a newer version?
16526
Should I upgrade to the "mainline" kernels?
211
Can I skip over releases when upgrading?
46043
Upgrade or replace a Wubi installation?
97346
Is it possible to skip releases during an upgrade?