Dell PowerVault 720N, Command Reference Manual, Page: 90 / 606

2-32 Dell PowerVault 720N, 740N, and 760N System Administrator and Command Reference Guide
NOTE: There is currently no Windows 9x or Windows NT counterpart to the
rdate
command. If you want to use the
rdate
command, you must have a UNIX worksta-
tion that supports
rdate
on your filer’s network.
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You use the
rdate
command when you need time accuracy only to the second, or
when you want to keep your current method of synchronizing time.
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To keep the filer’s clock accurate, regularly run the
rdate
command on the filer with
the target machine, a computer that maintains accurate time and that supports the
port 37 UDP time service. For example, if the name of the target computer is
time_node, enter
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A typical scheme is to have a UNIX computer run a periodic
cron
job that executes
the appropriate
rdate
command on your filer through
rsh
. The computer and the
user (if not root) running the
cron
job must be in the filer’s
/etc/hosts.equiv
file on the
root volume.
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For example, on the UNIX computer named adminhost, the user named adminuser
sets up a
cron
job to run every day at 3 a.m. It directs the filer named filer to request
a time update from the computer named time_node, which maintains an accurate
time and supports the UDP time service.
crontab entry: The
crontab
entry on the UNIX system is as follows:
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Entry in /hosts/equiv file: The
/etc/hosts.equiv
file on filer must contain the follow-
ing line:
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The adminhost and time_node host names must be known to the filer.
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You control how time is synchronized using SNTP and whether time changes are
logged by using the
timed
options.