centos man page for usleep

USLEEP(1)						      General Commands Manual							 USLEEP(1)

NAME
       usleep - sleep some number of microseconds

SYNOPSIS
       usleep [number]

DESCRIPTION
       usleep sleeps some number of microseconds.  The default is 1.

OPTIONS
       --usage Show short usage message.

       --help, -?
	      Print help information.

       -v, --version
	      Print version information.

BUGS
       Probably not accurate on many machines down to the microsecond.	Count on precision only to -4 or maybe -5.

AUTHOR
       Donald Barnes <djb@redhat.com>
       Erik Troan <ewt@redhat.com>

								   Red Hat, Inc 							 USLEEP(1)