{"id":1990,"date":"2017-03-27T07:39:33","date_gmt":"2017-03-26T23:39:33","guid":{"rendered":"http:\/\/cn.hostease.com\/xueyuan\/?p=1990"},"modified":"2024-11-15T16:47:33","modified_gmt":"2024-11-15T08:47:33","slug":"centos%e6%9e%b6%e8%ae%bentp%e6%97%b6%e9%97%b4%e6%9c%8d%e5%8a%a1%e5%99%a8","status":"publish","type":"post","link":"https:\/\/cn.hostease.com\/xueyuan\/jishu\/linux\/centos%e6%9e%b6%e8%ae%bentp%e6%97%b6%e9%97%b4%e6%9c%8d%e5%8a%a1%e5%99%a8\/","title":{"rendered":"CentOS\u67b6\u8bbeNTP\u65f6\u95f4\u670d\u52a1\u5668"},"content":{"rendered":"

1. NTP\u7b80\u4ecb<\/h2>\n

NTP\uff08Network Time Protocol\uff0c\u7f51\u7edc\u65f6\u95f4\u534f\u8bae\uff09\u662f\u7528\u6765\u4f7f\u7f51\u7edc\u4e2d\u7684\u5404\u4e2a\u8ba1\u7b97\u673a\u65f6\u95f4\u540c\u6b65\u7684\u4e00\u79cd\u534f\u8bae\u3002\u5b83\u7684\u7528\u9014\u662f\u628a\u8ba1\u7b97\u673a\u7684\u65f6\u949f\u540c\u6b65\u5230\u4e16\u754c\u534f\u8c03\u65f6UTC\uff0c\u5176\u7cbe\u5ea6\u5728\u5c40\u57df\u7f51\u5185\u53ef\u8fbe0.1ms\uff0c\u5728\u4e92\u8054\u7f51\u4e0a\u7edd\u5927\u591a\u6570\u7684\u5730\u65b9\u5176\u7cbe\u5ea6\u53ef\u4ee5\u8fbe\u52301-50ms\u3002
\nNTP\u670d\u52a1\u5668\u5c31\u662f\u5229\u7528NTP\u534f\u8bae\u63d0\u4f9b\u65f6\u95f4\u540c\u6b65\u670d\u52a1\u7684\u3002<\/p>\n

2. NTP\u670d\u52a1\u5668\u5b89\u88c5<\/h2>\n
#\u00a0\u7cfb\u7edf\u81ea\u5e26ntp
\n[root@xuliangwei
\n~]# rpm -qa ntp
\nntp-4.2.6p5-5.el6.centos.x86_64
\n#\u00a0\u5982\u679c\u6ca1\u6709\u5c31\u5b89\u88c5
\nyum -y
\ninstall ntp<\/div>\n

3.\u00a0\u914d\u7f6eNTP\u670d\u52a1<\/h2>\n
[root@xuliangwei
\n~]# vim \/etc\/ntp.conf
\n#
\nrestrict default kod nomodify notrap nopeer noquery
\nrestrict
\ndefault nomodify
\n# nomodify\u5ba2\u6237\u7aef\u53ef\u4ee5\u540c\u6b65
\n#\u00a0\u5c06\u9ed8\u8ba4\u65f6\u95f4\u540c\u6b65\u6e90\u6ce8\u91ca\u6539\u7528\u53ef\u7528\u6e90
\n#
\nserver 0.centos.pool.ntp.org iburst
\n#
\nserver 1.centos.pool.ntp.org iburst
\n#
\nserver 2.centos.pool.ntp.org iburst
\n#
\nserver 3.centos.pool.ntp.org iburst
\nserver
\nntp1.aliyun.com
\nserver
\ntime.nist.gov<\/div>\n

4.\u00a0\u542f\u52a8NTP\u670d\u52a1\u5668<\/h2>\n
#\u00a0\u5982\u679c\u8ba1\u5212\u4efb\u52a1\u6709\u65f6\u95f4\u540c\u6b65\uff0c\u5148\u6ce8\u91ca\uff0c\u4e24\u79cd\u7528\u6cd5\u4f1a\u51b2\u7a81\u3002
\n[root@xuliangwei
\n~]# crontab -e
\n# time
\nsync by oldboy at 2010-2-1
\n#*\/5 *
\n* * * \/usr\/sbin\/ntpdate time.nist.gov >\/dev\/null 2>&1
\n[root@xuliangwei
\n~]# \/etc\/init.d\/ntpd start
\nStarting
\nntpd:[\u00a0 OK\u00a0 ]
\n[root@oldboyedu
\n~]# ntpq -p
\nremote\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 refid\u00a0\u00a0\u00a0\u00a0\u00a0 st t when poll reach\u00a0\u00a0 delayoffset\u00a0 jitter
\n==============================================================================
\n*ntp1.aliyun.com
\n10.137.38.86\u00a0\u00a0\u00a0\u00a0 2 u\u00a0\u00a0 2264\u00a0\u00a0\u00a0 1\u00a0 525.885-42.367\u00a0\u00a0 0.000
\n[root@xuliangwei
\n~]# ntpstat
\nsynchronised
\nto NTP server (110.75.186.247) at stratum 3
\ntime correct to within 4257 ms
\npolling server every 64 s
\n[root@xuliangwei
\n~]# ntpdate 10.0.0.9
\n7 Dec 18:43:07 ntpdate[26950]: the NTP socket
\nis in use, exiting<\/div>\n

5.\u00a0\u5ba2\u6237\u673a\u65f6\u95f4\u540c\u6b65<\/h2>\n

\u5ba2\u6237\u673a\u8981\u7b49\u51e0\u5206\u949f\u518d\u4e0e\u65b0\u542f\u52a8\u7684ntp\u670d\u52a1\u5668\u8fdb\u884c\u65f6\u95f4\u540c\u6b65\uff0c\u5426\u5219\u4f1a\u63d0\u793ano\u00a0server suitable for synchronization found\u9519\u8bef\u3002<\/p>\n

[root@zyops
\n~]# ntpdate 10.0.0.9
\n7 Dec 18:40:16 ntpdate[1453]: step time server
\n10.0.0.9 offset 40.880807 sec
\n#\u00a0\u5c06\u547d\u4ee4\u653e\u5165\u8ba1\u5212\u4efb\u52a1\u5373\u53ef\u3002<\/div>\n","protected":false},"excerpt":{"rendered":"

1. NTP\u7b80\u4ecb NTP\uff08Network Time Protocol\uff0c\u7f51\u7edc\u65f6\u95f4\u534f\u8bae\uff09\u662f\u7528\u6765\u4f7f\u7f51\u7edc\u4e2d\u7684\u5404\u4e2a\u8ba1\u7b97\u673a … \u9605\u8bfb\u66f4\u591a<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[49],"tags":[1615,1616,1617],"class_list":["post-1990","post","type-post","status-publish","format-standard","hentry","category-linux","tag-centos","tag-ntp","tag-1617"],"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/1990","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/comments?post=1990"}],"version-history":[{"count":1,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/1990\/revisions"}],"predecessor-version":[{"id":1991,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/1990\/revisions\/1991"}],"wp:attachment":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/media?parent=1990"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/categories?post=1990"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/tags?post=1990"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}