Sorry, the crontab line is: * 1 * * * my_command On Sun, Jan 23, 2011 at 12:11 AM, Kejia柯嘉 <w.kejia@gmail.com> wrote: > Hi people, > > How does the following crontab line run: > * 1 * * * * my_command > Every minute of every 1 o'clock? Or only once of every 1 o'clock? > > --------------------- > Kejia >