On 4/7/06, Paul Howarth <paul@xxxxxxxxxxxx> wrote: > Dan Track wrote: > > Hi > > > > Simple question, I'm running a command `command`, what I'd like to do > > is check to see if the response is empty then exit. Does anyone know > > how I can perform that check? > > Exit if "command" produces no output: > [ -z "$(command)" ] && exit > Hi When I do 'man bash' I can't find any instance of -z, any ideas where it came from? Dan
