linux服务ntp

NTP服务器

NTP --------- Network Time Protocol 网络时间协议

软件： ntp

配置文件：/etc/ntp.conf

服务：ntpd

端口：123/udp

示例：配置ntp时间服务器

1) 安装ntp软件

[[email protected] ~]# yum install -y ntp

2) 编辑ntp配置文件

[[email protected] ~]# vim /etc/ntp.conf

restrict 192.168.87.0 mask 255.255.255.0 nomodify

server 127.127.1.0 iburst

fudge 127.127.1.0 stratum 10

[[email protected] ~]# systemctl start ntpd

[[email protected] ~]# systemctl enable ntpd

Created symlink from /etc/systemd/system/multi-user.target.wants/ntpd.service to /usr/lib/systemd/system/ntpd.service.

[[email protected] ~]#

[[email protected] ~]# ss -anup | grep :123

UNCONN     0      0      192.168.124.1:123                      *:*                   users:(("ntpd",pid=6092,fd=20))

UNCONN     0      0      192.168.87.101:123                      *:*                   users:(("ntpd",pid=6092,fd=19))

3) 关闭SELinux和防火墙

客户端测试：

[[email protected] ~]# ntpdate 192.168.87.101

11 Nov 12:15:19 ntpdate[13399]: adjust time server 192.168.87.101 offset -0.001224 sec

[[email protected] ~]#