sleep — Delay for a specified amount of time
sleep {time}
This command is used to pause execution for a given length of time. The time given must be a simple integer number of seconds.
Example 51. Using the sleep command to delay execution
>date ; sleep 15 ; date ; sleep 9 ; date ; sleep 292 ; date Fri Jan 05 04:25:51 2003 Fri Jan 05 04:26:06 2003 Fri Jan 05 04:26:15 2003 Fri Jan 05 04:31:07 2003 >