cronjob [-cEfjrs] [long options...]
-c --command command to run (passed to ``)
-s --subject subject of mail to send (defaults to command)
-r --rcpt recipient of mail; may be given many times
-E --errors-only do not send mail if exit code 0, even with output
-f --sender sender for message
-j --jobname job name; used for locking, if given
--ignore-errors error types to ignore (like: lock)
--lock lock this job (defaults to true; --no-lock for off)
