Provided by: openntpd_3.9p1+debian-9_amd64 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 syslog(3).

       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 default.

       -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)