I tried to install Gnome 3 on Debian Testing following this explanation. However, this didn't work and left me without any graphical user interface.
At the moment I try to fix that and I realised there is a long list of packages marked as manually installed. I stored a (line-break separated) list of the packages that – in my opinion – should be marked as auto installed (nearly all of them).
Now I want to run
apt-mark auto for this list.
How do I do that?
P.S.: I also would appreciate if somebody tells me that this is not a good idea (if it isn't).