The apt-mark command
show, set and unset various settings for a package 2 examples from the lessons of the IVski Linux Playground — try them in the terminal next to them.
Subcommands in the examples
apt-mark hold- hold is used to mark a package as held back, which will prevent the package from being automatically installed, upgraded or removed.
apt-mark unhold- unhold is used to cancel a previously set hold on a package to allow all actions again.
Examples
sudo apt-mark hold htopPrevent htop from being upgraded
sudo apt-mark unhold htop