Why? C-r and C-s already do each of these, and C-p and C-n are for going back and forward in history. (Personally, I use M-p and M-n so that bash in the terminal works like Emacs.)

Doessn't that just do the same thing as the built-in Ctrl-r and Ctrl-s? Also, Ctrl-p and Ctrl-n are already used to cycle through previous commands.

You usually can't use C-s because it's bound to stop.

$ stty stop undef