用ntpdate同步时间
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[root@steven ~]# ntpdate time.windows.com
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6 Mar 11:04:09 ntpdate[1937]: step time server 64.4.10.33 offset 66.227650 sec
返回类似以下结果表示同步成功:
6 Mar 11:04:09 ntpdate[1937]: step time server 64.4.10.33 offset 66.227650 sec
当然可以局域网内自己搭建一台ntpd时间服务器,用来同步局域网内机器的时间
一、安装
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[root@steven ~]# yum install ntp -y
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Loaded plugins: fastestmirror, security
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Loading mirror speeds from cached hostfile
二、用cat命令查看ntp的配置:
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[root@steven ~]# cat /etc/ntp.conf
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# For more information about this file, see the man pages
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# ntp.conf(5), ntp_acc(5), ntp_auth(5), ntp_clock(5), ntp_misc(5), ntp_mon(5).
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driftfile /var/lib/ntp/drift
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# Permit time synchronization with our time source, but do not
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# permit the source to query or modify the service on this system.
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restrict default kod nomodify notrap nopeer noquery
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restrict -6 default kod nomodify notrap nopeer noquery
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# Permit all access over the loopback interface. This could
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# be tightened as well, but to do so would effect some of
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# the administrative functions.
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restrict 127.0.0.1
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restrict -6 ::1
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# Hosts on local network are less restricted.
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#restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap
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# Use public servers from the pool.ntp.org project.
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# Please consider joining the pool (http://www.pool.ntp.org/join.html).
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server 0.centos.pool.ntp.org iburst
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server 1.centos.pool.ntp.org iburst
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server 2.centos.pool.ntp.org iburst
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server 3.centos.pool.ntp.org iburst
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#broadcast 192.168.1.255 autokey # broadcast server
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#broadcastclient # broadcast client
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#broadcast 224.0.1.1 autokey # multicast server
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#multicastclient 224.0.1.1 # multicast client
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#manycastserver 239.255.254.254 # manycast server
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#manycastclient 239.255.254.254 autokey # manycast client
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# Enable public key cryptography.
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#crypto
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includefile /etc/ntp/crypto/pw
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# Key file containing the keys and key identifiers used when operating
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# with symmetric key cryptography.
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keys /etc/ntp/keys
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# Specify the key identifiers which are trusted.
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#trustedkey 4 8 42
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# Specify the key identifier to use with the ntpdc utility.
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#requestkey 8
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# Specify the key identifier to use with the ntpq utility.
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#controlkey 8
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# Enable writing of statistics records.
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#statistics clockstats cryptostats loopstats peerstats
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红色部分是默认的ntp服务器地址,找出来以备ntpdate 使用
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