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10431052 of 2030 results
1043.
NTP is a TCP/IP protocol for synchronising time over a network. Basically a client requests the current time from a server, and uses it to set its own clock.
NTP 是通过网络来同步时间的一种 TCP/IP 协议。通常客户端向服务器请求当前的时间,并根据结果来设置其时钟。
Translated and reviewed by Ihnus Qcshz
Located in serverguide/C/network-config.xml:1035(para)
1044.
Behind this simple description, there is a lot of complexity - there are tiers of NTP servers, with the tier one NTP servers connected to atomic clocks (often via GPS), and tier two and three servers spreading the load of actually handling requests across the internet. Also the client software is a lot more complex than you might think - it has to factor out communication delays, and adjust the time in a way that does not upset all the other processes that run on the server. But luckily all that complexity is hidden from you!
在这个简单描述的背后,隐藏着许多复杂的事情 - 有数层的 NTP 服务器,第一层是连接到原子钟(通常是通过 GPS)的 NTP 服务器,第二层和第三层服务器分散负载并实际处理来自互联网的请求。客户端软件也要比您可能想到的更加复杂 - 其必需推导出通讯的延迟,并以不会干扰您服务器上其它进程工作的方式来调整时间。但幸运的是所有这些复杂性都对您隐藏起来了!
Translated and reviewed by Ihnus Qcshz
1045.
Ubuntu has two ways of automatically setting your time: ntpdate and ntpd.
Ubuntu 有两种方式可以自动设置您的时间:ntpdate 和 ntpd。
Translated and reviewed by Ihnus Qcshz
Located in serverguide/C/network-config.xml:1041(para)
1046.
ntpdate
ntpdate
Translated and reviewed by Ihnus Qcshz
Located in serverguide/C/network-config.xml:1046(title)
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
There are line breaks here. Each one represents a line break. Start a new line in the equivalent position in the translation.
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
There are line breaks here. Each one represents a line break. Start a new line in the equivalent position in the translation.
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)
10431052 of 2030 results

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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.