Stackoverflow to the rescue: http://apple.stackexchange.com/questions/3253/ctrl-o-behavior-in-terminal-app http://apple.stackexchange.com/questions/3253/ctrl-o-

Stackoverflow to the rescue: http://apple.stackexchange.com/questions/3253/ctrl-o-behavior-in-terminal-app http://apple.stackexchange.com/questions/3253/ctrl-o-behavio... This turns out to be because on OSX the terminal driver defaults to throwing away control-O which is rather unhelpful of it. "stty discard undef" fixes it.