RDATE(8) BSD System Manager's Manual RDATE(8)
rdate - set the system's date from a remote host
rdate [-346adnprsv] [-P ntpport] host
rdate displays and sets the local date and time from the host name or ad-
dress given as the argument. The time source may be an RFC 868 TCP proto-
col server, which is usually implemented as a built-in service of
inetd(8), or an RFC 2030 protocol SNTP/NTP server. By default, rdate uses
the RFC 868 TCP protocol.
The options are as follows:
-3 Sets the NTP protocol version to 3.
-4 Forces rdate to use IPv4 addresses only.
-6 Forces rdate to use IPv6 addresses only.
-a Use the adjtime(2) call to gradually skew the local time to the
remote time rather than just hopping.
-d Debug the SNTP exchange. If given twice, debug each packet re-
ceived.
-n Use SNTP (RFC 2030) instead of the RFC 868 time protocol.
-P ntpport
With -n, use the UDP port ntpport instead of the default 123.
-p Do not set, just print the remote time.
-r Show the remainder from the last adjtime(2) call.
-s Do not print the time. If set, any previous -v options will be
ignored.
-v Verbose output. Always show the adjustment. Put this on a command
line to reset all previous -s options.
/var/log/wtmp record of date resets and time changes
date(1), adjtime(2), crontab(1), gettimeofday(2), symlink(7), inetd(8),
ntpd(8), timed(8)
MirOS BSD #10-current November 22, 2009 1
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