Whenever I launch X, I would like my desktop environment (right now it's Gnome, last week it was KDE, next week it may be Blackbox...) to run
xgamma -gamma 2.4
automatically. (I have to go into the shell to do this everytime, and it's getting to be a drag.) I have to do this because my display is pretty dark at its default gamma.
I have no prior experience running commands automatically, so please talk to me like a child.