How do you do bootstrapping of blanko machines?
Imagine you get a linux/BSD/osx machine and you want it set it up to a defined state to be prepared for further setup.
Like users
ssh config
Sudoers file
Config management client or credentials
Software like vim, htop and tmux

A simple shell script sounds a bit archaic to me and i was wondering, if there is a better way...

Makefiles also came to my mind but still... Unsatisfactual