apt-mark

Utility to change the status of installed packages. More information: https://manned.org/apt-mark.8.

• Mark a package as automatically installed:

sudo apt-mark auto package

• Hold a package at its current version and prevent updates to it:

sudo apt-mark hold package

• Allow a package to be updated again:

sudo apt-mark unhold package

• Show manually installed packages:

apt-mark showmanual

• Show held packages that aren't being updated:

apt-mark showhold