— set the
system's date from a remote host
displays and sets the local date and time
from the host name or address given as the argument. The time source may be an
RFC 5905 protocol SNTP/NTP server or an RFC 868 TCP protocol server, which is
usually implemented as a built-in service of
. By default,
uses the RFC 5905 SNTP/NTP protocol.
The options are as follows:
- Forces rdate to use IPv4
- Forces rdate to use IPv6
- Use the
adjtime(2) call to
gradually skew the local time to the remote time rather than just
- Correct leap seconds. This should be used only when
synchronizing to a server which does not correctly account for leap
- Use SNTP (RFC 5905) instead of the RFC 868 time protocol.
This is the default. This protocol counts 32 bits of seconds from January
1, 1900 and will rollover in March 2036.
- Use an RFC 868 TCP protocol server instead of SNTP. This
protocol is obsolete as it is not capable of representing dates past
January 19, 2038 03:14:07 GMT.
- Do not set, just print the remote time.
- Do not print the time.
- Verbose output. Always show the adjustment.
- record of date resets and time changes
To get the legal time in Germany, set the
the following command:
# rdate -v ptbtime1.ptb.de
The command of course assumes you have a working internet connection and DNS set
up to connect to the server at