I'd like to run an app (Python Tk, say) prior to the login screen on LMC 17. I notice that there's plenty of Q&A on doing this on Ubuntu (here, for eg), but couldn't really find anything relevant on Linux Mint.
[UPDATE] Okay, I do see that the qs is very similar to the one pointed out by several folks. However, I still don't find an answer particularly pertaining to the Linux Mint 17 Cinnamon display manager - which appears to be mdm :
$ cat /etc/issue Linux Mint 17 Qiana \n \l $ cat /etc/X11/default-display-manager /usr/sbin/mdm $
So, particularly, how do I leverage (or otherwise) use mdm to run an app prior to login? Note, for this to be useful: the app itself is graphical, hence X should be running by this point..