Today while installing VirtualBox in my Debian Linux (I want to install Ubuntu on my Debian). Accidentaly I have "re-installed" a package that was already part of the VitualBox combo. So that changed the flag from manual to auto installed in that package.
This is what I have done:
apt-get install virtualbox-dkms
This what Debian replied to me:
Reading package lists... Done Building dependency tree Reading state information... Done virtualbox-dkms is already the newest version. virtualbox-dkms set to manually installed.
That means, that if I ever uninstall VirtualBox, virtualbox-dkms will remain installed, I do not want that.
So, I have used
apt-mark to set it to auto installed again.
apt-mark auto virtualbox-dkms
And Debian replied:
virtualbox-dkms set to automatically installed.
Everything normal again.