How to upgrade my Ubuntu 15.04 to Ubuntu 16.04
1520
How to install software or upgrade from an old unsupported release?
63176
How can I update to Ubuntu 21.04?
113056
How to upgrade from 12.04 to 12.10 using CD?
87236
How to upgrade Ubuntu 12.04 to 13.10?
66915
How to request a package upgrade in the next Ubuntu release
16578
How to upgrade a single package using apt-get?
151605
upgrading from 15.10 to 16.04 apt not installed
43778
Is it possible to "upgrade" from a 32bit to a 64bit installation?
88086
How to install Ubuntu 16.10 without any gui?
117438
Install Ubuntu 18.04 on Dell XPS 15 9570
129101
Upgrading Ubuntu 9.04 to 9.10 when Update Manager doesn't let you
30645
How to install (old) packages for Ubuntu 9.04?
20751
Problem upgrading Ubuntu 9.10
59088
How to upgrade to a newer release of Ubuntu using the Live CD?
36703
How do I upgrade from 12.10 to 13.04?
63514
How do I decide what version of Ubuntu to install?
15687
How do I resume a release upgrade?