sleep
sleep: wait for a time.
Synopsis
sleep seconds
Description
sleep waits seconds seconds, then exits. The number may have a fraction (sleep 0.5).
Exit status
0 after the wait; 1, with a usage message, when seconds is missing or isn’t a number.
Notes
Only one argument is read; there are no unit suffixes (s, m, h).
See also
sh(1), time(1)