FB: /etc/ntp.conf was updated as below such that it refers nodus and also caltech server when nodus is not available
ntpd was restarted and
diskless RT machines: they are booted from /diskless/root on fb.
Therefore /diskless/root/etc/ntp.conf was updated in the same way as above.
When the machines are rebooted, this setting will be active.
now they are referring nodus and other external servers too.