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  1. Hardy (8.04)
  2. Template “serverguide”
  3. Chinese (Simplified) (zh_CN)
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1047 → 1056 of 2030 results First • • • Last
1047.
Ubuntu comes with ntpdate as standard, and will run it once at boot time to set up your time according to Ubuntu's NTP server. However, a server's clock is likely to drift considerably between reboots, so it makes sense to correct the time occasionally. The easiest way to do this is to get cron to run ntpdate every day. With your favourite editor, as root, create a file <code>/etc/cron.daily/ntpdate</code> containing:
(no translation yet)
1048.
ntpdate ntp.ubuntu.com
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ntpdate ntp.ubuntu.com
Translated and reviewed by Ihnus Qcshz
Located in serverguide/C/network-config.xml:1052(screen)
1049.
The file <code>/etc/cron.daily/ntpdate</code> must also be executable.
<code>/etc/cron.daily/ntpdate</code> 文件还必须是可执行的。
Translated and reviewed by Ihnus Qcshz
Located in serverguide/C/network-config.xml:1054(para)
1050.
sudo chmod 755 /etc/cron.daily/ntpdate
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sudo chmod 755 /etc/cron.daily/ntpdate
Translated and reviewed by Ihnus Qcshz
Located in serverguide/C/network-config.xml:1057(screen)
1051.
ntpd
ntpd
Translated and reviewed by Ihnus Qcshz
Located in serverguide/C/network-config.xml:1061(title)
1052.
ntpdate is a bit of a blunt instrument - it can only adjust the time once a day, in one big correction. The ntp daemon ntpd is far more subtle. It calculates the drift of your system clock and continuously adjusts it, so there are no large corrections that could lead to inconsistent logs for instance. The cost is a little processing power and memory, but for a modern server this is negligible.
ntpdate 有些迟钝 - 它只能一天调整一次时间，每次都是一个大改动。而 ntp 守护进程 ntpd 就很灵巧。它会计算您系统时钟的偏差并持续不断地调整时间，这样就不至于因为调整过大而引起像日志不一致这样的问题。其代价是消耗一点处理能力和内存，但对于现代服务器来说这点是可以忽略的。
Translated and reviewed by Ihnus Qcshz
Located in serverguide/C/network-config.xml:1062(para)
1053.
To set up ntpd:
若想设置 ntpd：
Translated and reviewed by Ihnus Qcshz
Located in serverguide/C/network-config.xml:1065(para)
1054.
sudo apt-get install ntp
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(no translation yet)
Located in serverguide/C/network-config.xml:1066(screen)
1055.
Changing Time Servers
改变时间服务器
Translated and reviewed by Ihnus Qcshz
Located in serverguide/C/network-config.xml:1071(title)
1056.
In both cases above, your system will use Ubuntu's NTP server at <code>ntp.ubuntu.com</code> by default. This is OK, but you might want to use several servers to increase accuracy and resilience, and you may want to use time servers that are geographically closer to you. to do this for ntpdate, change the contents of <code>/etc/cron.daily/ntpdate</code> to:
在上述的两种情况中，您的系统会默认使用位于 <code>ntp.ubuntu.com</code> 的 Ubuntu NTP 服务器。这没有问题，但您可以会想使用多个服务器来增加准确性和弹性，并且使用在地理位置上更接近您的时间服务器。若要对 ntpdate 这样做，请将 <code>/etc/cron.daily/ntpdate</code> 的内容修改为：
Translated and reviewed by Ihnus Qcshz
Located in serverguide/C/network-config.xml:1072(para)
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Contributors to this translation: Adavak, Aron Xu, Chen Ming, Congping Hao, Constine, EAdam, Hugh SH, Ihnus Qcshz, John Lu, Johnson Zhu, Jun CHEN, Justin Yang, Li Linxiao, Luo Jiawei, Magicnight, Proton, Quantum, Rkyo, Shining, Tao Wei, Tom Wei, USSR, Vally, Wylmer Wang, XUE Can, Yiding He, firingstone, ggarlic, hunhun, jinxin16897123, jpartley, king_li, lainme, luckyone, mahongquan, markgoo, maxim(Feng Liu), sdxianchao, snowwhite, stone_unix, wangajing, wsw, xiajiebuhui, yuane, yugq, zhangmiao, zhongxin, 姚渺波, 龚韬.