11-18-2010
On a Linux system use your distributions software management tool to install ntpd (the official server). Edit the configuration file to use around 3 servers to synch with (see the link ctsgnb gave for a list of pools geographically near you), or just the one you have available locally. When you start the NTP server it will automatically synch with the servers you've specified, as well as provide that time to the local network for other NTP clients/servers.
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LEARN ABOUT DEBIAN
ntptrace
NTPTRACE(1) General Commands Manual NTPTRACE(1)
NAME
ntptrace - trace a chain of NTP servers back to the primary source
SYNOPSIS
ntptrace [ -m max_hops ] [ -n ]
DESCRIPTION
ntptrace determines where a given Network Time Protocol (NTP) server gets its time from, and follows the chain of NTP servers back to their
master time source. If given no arguments, it starts with localhost. Here is an example of the output from ntptrace:
% ntptrace
localhost: stratum 4, offset 0.0019529, synch distance 0.144135
server2ozo.com: stratum 2, offset 0.0124263, synch distance 0.115784
usndh.edu: stratum 1, offset 0.0019298, synch distance 0.011993, refid 'WWVB'
On each line, the fields are (left to right): the host name, the host stratum, the time offset between that host and the local host (as
measured by ntptrace; this is why it is not always zero for "localhost"), the host synchronization distance, and (only for stratum-1
servers) the reference clock ID. All times are given in seconds. Note that the stratum is the server hop count to the primary source, while
the synchronization distance is the estimated error relative to the primary source. These terms are precisely defined in RFC-1305.
OPTIONS
-m max_hops
Sets the number of server hops to follow (default = 99).
-n Turns off the printing of host names; instead, host IP addresses are given. This may be useful if a nameserver is down.
BUGS
This program makes no attempt to improve accuracy by doing multiple samples.
Network Time Protocol December 4, 2011 NTPTRACE(1)