zoukankan      html  css  js  c++  java
  • 时间同步ntp服务的安装与配置

    通过ntp服务实现时间同步。

    1:首先搭建本地yum源见网址(http://www.cnblogs.com/zj21/p/6223462.html)

    2:先安装ntp服务

    [root@jw37 ~]# yum install ntp -y

    3:修改ntp的配置文件

    复制代码
    [root@jw37 ~]# vi /etc/ntp.conf 

    # For more information about this file, see the man pages
    # ntp.conf(5), ntp_acc(5), ntp_auth(5), ntp_clock(5), ntp_misc(5), ntp_mon(5).

    driftfile /var/lib/ntp/drift

    # Permit time synchronization with our time source, but do not
    # permit the source to query or modify the service on this system.
    restrict default nomodify notrap nopeer noquery

    # Permit all access over the loopback interface. This could
    # be tightened as well, but to do so would effect some of
    # the administrative functions.
    restrict 127.0.0.1
    restrict ::1

    # Hosts on local network are less restricted.
    #restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap

    # Use public servers from the pool.ntp.org project.
    # Please consider joining the pool (http://www.pool.ntp.org/join.html).
    server 192.168.100.140 iburst   #目标网络地址
    #server 1.centos.pool.ntp.org iburst #注释掉默认的ntp服务器
    #server 2.centos.pool.ntp.org iburst
    #server 3.centos.pool.ntp.org iburst

    #broadcast 192.168.1.255 autokey # broadcast server
    #broadcastclient # broadcast client
    #broadcast 224.0.1.1 autokey # multicast server
    #multicastclient 224.0.1.1 # multicast client
    #manycastserver 239.255.254.254 # manycast server
    #manycastclient 239.255.254.254 autokey # manycast client

    # Enable public key cryptography.
    #crypto

    includefile /etc/ntp/crypto/pw

    # Key file containing the keys and key identifiers used when operating
    # with symmetric key cryptography.
    keys /etc/ntp/keys

    # Specify the key identifiers which are trusted.
    #trustedkey 4 8 42

    # Specify the key identifier to use with the ntpdc utility.
    #requestkey 8

    # Specify the key identifier to use with the ntpq utility.
    #controlkey 8

    # Enable writing of statistics records.
    #statistics clockstats cryptostats loopstats peerstats

    # Disable the monitoring facility to prevent amplification attacks using ntpdc
    # monlist command when default restrict does not include the noquery flag. See

    复制代码

    保存退出。

    4:启动服务并设置开启自启

    复制代码
    [root@jw37 ~]# systemctl start ntpd.service  #启动服务
    [root@jw37 ~]# systemctl enable ntpd.service  #设置为开机启动

    [root@jw37 ~]# systemctl status ntpd.service  #查看运行状态
    ● ntpd.service - Network Time Service
    Loaded: loaded (/usr/lib/systemd/system/ntpd.service; enabled; vendor preset: disabled)
    Active: active (running) since 二 2016-11-08 02:59:39 CST; 5min ago   #红色部分为当前运行状态为running
    Main PID: 3185 (ntpd)
    CGroup: /system.slice/ntpd.service
    └─3185 /usr/sbin/ntpd -u ntp:ntp -g

    11月 08 02:59:39 jw37 ntpd[3185]: Listen and drop on 0 v4wildcard 0.0.0.0 UDP 123
    11月 08 02:59:39 jw37 ntpd[3185]: Listen and drop on 1 v6wildcard :: UDP 123
    11月 08 02:59:39 jw37 ntpd[3185]: Listen normally on 2 lo 127.0.0.1 UDP 123
    11月 08 02:59:39 jw37 ntpd[3185]: Listen normally on 3 eno16777736 192.168.100.137 UDP 123
    11月 08 02:59:39 jw37 ntpd[3185]: Listen normally on 4 lo ::1 UDP 123
    11月 08 02:59:39 jw37 ntpd[3185]: Listen normally on 5 eno16777736 fe80::20c:29ff:fe87:3eb2 UDP 123
    11月 08 02:59:39 jw37 ntpd[3185]: Listening on routing socket on fd #22 for interface updates
    11月 08 02:59:39 jw37 ntpd[3185]: 0.0.0.0 c016 06 restart
    11月 08 02:59:39 jw37 ntpd[3185]: 0.0.0.0 c012 02 freq_set kernel 0.000 PPM
    11月 08 02:59:39 jw37 ntpd[3185]: 0.0.0.0 c011 01 freq_not_set

    复制代码

     

     
  • 相关阅读:
    使用C#实现DHT磁力搜索的BT种子后端管理程序+数据库设计(开源)
    便携版WinSCP在命令行下同步文件夹
    ffmpeg (ffprobe)分析文件关键帧时间点
    sqlite删除数据或者表后,回收数据库文件大小
    ubuntu 20.04下 freeswitch 配合 fail2ban 防恶意访问
    ffmpeg使用nvenc编码的结论记录
    PC版跑跑卡丁车 故事模式 亚瑟传说章节 卡美洛庆典 2阶段 心灵之眼 攻略
    There was an error loading or playing the video
    Nvidia RTX Voice 启动报错修复方法
    火狐浏览器 关闭跨域限制
  • 原文地址:https://www.cnblogs.com/zj21/p/6223828.html
Copyright © 2011-2022 走看看