Upgrading Ubuntu 14.04 to 16.04 is not working
5407
How to fix "W: Duplicate sources.list entry"?
86777
Distribution upgrade problem "No new release found"
75798
How to upgrade to the latest GNOME version?
113056
How to upgrade from 12.04 to 12.10 using CD?
140850
Why does do-release-upgrade on Xubuntu running version 18.04 not offer to update to 20.04.1?
125976
What Happens When I Upgrade Ubuntu?
76241
"no public key available" while upgrading using update-manager
63278
Update Linux Subsystem on Windows (Ubuntu) to 16.04
100000
QGIS update from 2.14 to 2.16 failed on Ubuntu 14.04
35146
Will apt-get dist-upgrade upgrade my system to newer version?
42634
How do I upgrade to the development release (aka. Ubuntu+1)?
2670
Why is "No new release found" when upgrading from a LTS to the next?
75621
Store won't open after upgrade
20751
Problem upgrading Ubuntu 9.10
63176
How can I update to Ubuntu 21.04?
31892
New "Ubuntu Software" not working (16.04)
100135
What does "upgrade to 18.04" mean?