clockcheck connects to the time service (TCP port 37) on the named list of hosts and prints their reported time. It also flags hosts that are more than a specified number of seconds off from the current host.
It is intended as an administrative tool to poll a bunch of hosts and find ones where the clock has drifted too far.
clockcheck -t 4 www.ics.com rftm.mit.eduCompares the current host to www.ics.com and rftm.mit.edu. It will print a warning if either of the remote hosts reports a time that is more than 4 seconds different from the local host.
Note: The manual page below is produced using man2html. There are several formatting gliches which are unavoidable at this time. A correctly formatted manual page is in the file clockcheck.txt in the package.
clockcheck - compare times on a set of hosts
SYNOPSIS
clockcheck [-q] [-S] [-t threshold] [-p port] host ...
DESCRIPTION
Clockcheck compares the clocks of a set of hosts as
reported by the time service on port 37. It flags any
hosts that have a time differing from this host by a user-
specified delta. This can be used to quickly check all
machines in a farm to see if any of them have lost their
clock synchronization.
It can also be used to set the system clock by snarfing
the value of another system. When run from crontab this
way it makes a poor man's xntpd. For example
* * * * * /usr/local/bin/clockcheck -S timehost >/dev/null
OPTIONS
-q Quiet mode. Do not print names of hosts that
have the correct time.
-S Set the clock based on the average difference
from all the remote machines. You must be
super-user to do this.
-t threshold
Specify the allowed time difference in seconds.
(Default: 0)
-p port Use specified port rather than 37.
EXAMPLES
clockcheck -t 10 www.aiu.to www.ics.com
AUTHOR
Tony Aiuto <tony@aiu.to>
Comments and money to tony@aiu.to