On Mon, May 30, 2011 at 10:38 AM, Dotan Cohen <dotancohen at gmail.com> wrote: > All commands return a value, usually 0 if run properly. For instance, try: > $ ls && echo "done" > $ lsd && echo "done" > > The echo command is only executed if the ls command exited > successfully. If one did not add the echo command with the && after a > command, how can he determine if the command exited successfully? You can check the return code. $ ls $ echo $? 0 (usually) indicates success. - Bob