Update from 14.04.2 to 14.04.3 not happening
41964
Where is the update to 14.04.1 in update-manager?
42634
How do I upgrade to the development release (aka. Ubuntu+1)?
51350
While updating the ubuntu 16.04 does not have a Release file Error
4305
How do I fix a "Problem with MergeList" or "status file could not be parsed" error when trying to do an update?
29191
Upgrade to 18.04 from 17.10
35566
Kernel did not upgrade between 14.04 LTS to 16.04 LTS
53336
Set Update Manager to install to sites/all/modules/contrib?
12534
14.04 --> 16.04 failed; apt (>= 1.0.1ubuntu2.13)' is not installed
119595
Is it necessary to upgrade to 14.04 LTS or can I stand in 12.04 LTS forever with no problem?
35243
Is it safe to do-release-upgrade from 12.04.4 to 14.04.1?
64558
What does `do-release-upgrade` really do?
144172
How to upgrade to a point release from the same base release (12.04 to 12.04.03)
100000
QGIS update from 2.14 to 2.16 failed on Ubuntu 14.04
65099
Unable to install any updates through update manager/apt-get upgrade
63176
How can I update to Ubuntu 21.04?
113145
What does 'apt-get install update' do?
1520
How to install software or upgrade from an old unsupported release?