ntpdate slew模式微调时间crontab,参考

[hostname]# crontab -l
* * * * * /usr/sbin/ntpdate -B xxx.xxx.xxx.xxx 1>>/tmp/ntpdate.log 2>&1

-B参数的意思          Force the time to always be slewed using the adjtime() system call, even if the measured
                offset is greater than +-500 ms. The default is to step the time using settimeofday() if
                the offset is greater than +-500 ms. Note that, if the offset is much greater than +-500
                ms in this case, that it can take a long time (hours) to slew the clock to the correct
                value. During this time. the host should not be used to synchronize clients.

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[Linux] ntpdate slew模式调整时间

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