How to avoid upgrade the package(s) in upgrading?
5830
How to prevent updating of a specific package?
53588
How do remove the CD / DVD install as a source for apt-get packages when installing new features?
112955
How can I upgrade Ubuntu from 19.10 to 20.04 without losing packages?
22163
Programmatically disable apt unattended upgrades
84537
Using dpkg to install upgrade and dist-upgrade packages
42634
How do I upgrade to the development release (aka. Ubuntu+1)?
55857
How do I get a list of obsolete packages?
19288
Update manager doesn't offer an upgrade to the new release
16782
Install packages from newer release without building (apt pinning)
68597
Will upgrading Ubuntu remove installed software?
49161
Upgrade manager wants me to do a partial upgrade
113837
How can I install an older version of a package via NuGet?
66915
How to request a package upgrade in the next Ubuntu release
5820
How to fix the “Unable to calculate upgrade” issue from command line when upgrading from 12.04 to 14.04?
15687
How do I resume a release upgrade?
139753
Is it possible to downgrade packages installed with ELPA?
118978
Not all updates can be installed: partial upgrade