Ubuntu latest LTS is now released, why can't I upgrade from previous LTS? And how can I force the upgrade?
2670
Why is "No new release found" when upgrading from a LTS to the next?
59088
How to upgrade to a newer release of Ubuntu using the Live CD?
63176
How can I update to Ubuntu 21.04?
134080
Still can't upgrade? Is there a new delay?
114305
On really old Ubuntu 6.06 - How to upgrade
35243
Is it safe to do-release-upgrade from 12.04.4 to 14.04.1?
123413
Will apt-get dist-upgrade upgrade my system to a newer version?
7580
How to safely upgrade from an older Ubuntu version to a newer one?
63232
How to update kernel to the latest mainline version without any Distro-upgrade?
88901
Updates for Ubuntu LTS Desktop versus LTS Server
129223
Ubuntu upgrade from 17.04 to 18.04
129101
Upgrading Ubuntu 9.04 to 9.10 when Update Manager doesn't let you
86777
Distribution upgrade problem "No new release found"
115421
Ubuntu 13.10 to 14.04 Lts does not upgrade, keeps showing error
81434
support time of other Ubuntu LTS flavours?
127766
how to upgrade my Debian package with minor changes
144172
How to upgrade to a point release from the same base release (12.04 to 12.04.03)