Provided by: openntpd_3.9p1+debian-9_i386 bug


       ntpd - "Network Time Protocol daemon"


       ntpd [-dSs] [-f conffile] [-p pidfile]


       The  ntpd daemon synchronizes the local clock to one or more remote NTP
       servers, and can also act as an NTP server itself,  redistributing  the
       local  time.  It implements the Simple Network Time Protocol version 4,
       as described in RFC 2030, and the Network Time Protocol version  3,  as
       described in RFC 1305.

       ntpd  uses  the adjtime(2) system call to correct the local system time
       without causing time jumps.  Adjustments larger than 128ms  are  logged
       using  syslog(3) with LOG_INFO priority.  The threshold value is chosen
       to avoid having local clock drift thrash the log files.  Should ntpd be
       started with the -d option, all calls to adjtime(2) will be logged.

       When  ntpd  starts  up,  it  reads  settings from a configuration file,
       typically ntpd.conf(5).

       When ntpd receives a SIGUSR1 signal,  it  writes  its  peer  status  to

       The options are as follows:

       -d     Do not daemonize.  If this option is specified, ntpd will run in
              the foreground and log to stderr.

       -f conffile
              Use conffile as the configuration file, instead of  the  default

       -p pidfile
              Specify  the  name  and path of the file used to record the ntpd
              process ID.

       -S     Do not set  the  time  immediately  at  startup.   This  is  the

       -s     Set the time immediately at startup if the local clock is off by
              more than 180 seconds.  Allows  for  a  large  time  correction,
              eliminating the need to run rdate(8) before starting .


              default ntpd configuration file

              Contains the process ID of the ntpd listening for connections.


       date(1), adjtime(2), ntpd.conf(5), rdate(8), timed(8)

       , Network Time Protocol (Version 3), March 1992.

       , Simple Network Time Protocol (SNTP) Version 4, October 1996.


       The ntpd program first appeared in OpenBSD 3.6 .

                                 July 9, 2004                          NTPD(8)