Cron Job: Start it Only once on specified time
I want cron job to start the script on a specified time, i.e 9:00am, and it started only once. Because this script runs forever as long as there is no system boot up. I just want to start this script on the OS only once, if it is not already started, on a specified time. Script will be runnig forever without terminating.
Any idea how I can do this in cron?