Mauro wrote: > What's the difference of running ntpdate instead ntp with cron?
'ntpdate' jumps the clock. It was intended for use at system boot time when that is okay to do. 'ntpd' is a daemon that runs and makes small clock adjustments as needed to keep time without "jumping" it. The 'ntpdate' command is now deprecated. It's functionality has been written into the ntp daemon code. The ntpd daemon now has ntpdate functionality with: $ man ntpd -g Normally, ntpd exits with a message to the system log if the offset exceeds the panic threshold, which is 1000 s by default. This option allows the time to be set to any value without restriction; however, this can happen only once. If the threshold is exceeded after that, ntpd will exit with a message to the system log. This option can be used with the -q and -x options. -q Exit the ntpd just after the first time the clock is set. This behavior mimics that of the ntpdate program, which is to be retired. The -g and -x options can be used with this option. Note: The kernel time discipline is disabled with this option. Running ntpd to adjust the clock continuously is much better than jumping the clock with ntpdate. Bob
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