linux man page for ntptime

NTPTIME(8)						      System Manager's Manual							NTPTIME(8)

NAME
       ntptime - read kernel time variables

SYNOPSIS
       ntptime [ -chr ] [ -e est_error ] [ -f frequency ] [ -m max_error ] [ -o offset ] [ -s status ] [ -t time_constant ]

DESCRIPTION
       This  program  is  useful  only	with special kernels described in the A Kernel Model for Precision Timekeeping page. It reads and displays
       time-related kernel variables using the ntp_gettime() system call. A similar display can be obtained using the ntpdc program  and  kerninfo
       command.

OPTIONS
       -c     Display the execution time of ntptime itself.

       -e est_error
	      Specify estimated error, in microseconds.

       -f frequency
	      Specify frequency offset, in parts per million.

       -h     Display help information.

       -m max_error
	      Specify max possible errors, in microseconds.

       -o offset
	      Specify clock offset, in microseconds.

       -r     Display Unix and NTP times in raw format.

       -s status
	      Specify clock status. Better know what you are doing.

       -t time_constant
	      Specify time constant, an integer in the range 0-10.

Network Time Protocol						  October 7, 2006							NTPTIME(8)