Can I go from 15.10 to 16.04
43236
Should I upgrade when a development branch becomes stable?
49889
Will there be data loss if I upgrade?
63176
How can I update to Ubuntu 21.04?
100135
What does "upgrade to 18.04" mean?
32200
How do I downgrade a package?
151605
upgrading from 15.10 to 16.04 apt not installed
129223
Ubuntu upgrade from 17.04 to 18.04
102110
When is 16.04 going to be officially available on AWS?
140371
Update Ubuntu 10.04
33651
How to upgrade from Ubuntu 12.10 to 14.04
1520
How to install software or upgrade from an old unsupported release?
16050
Can I upgrade Xubuntu 18.04 32-bit?
119971
Install 17.10 on 32 bit machine
58979
How can I upgrade Ubuntu LTS to the next one offline?
89856
How to resume the interrupted upgrade from 14.10 to 15.04?
119169
Should I upgrade to 14.04 LTS?
74990
Error while trying to upgrade from Ubuntu 18.04 to 18.10: "Please install all available updates for your release before upgrading."