Linux Services NTP

NTP server

NTP---------Network Time Protocol

Software: NTP

Configuration file:/etc/ntp.conf

Service: NTPD

Port: 123/UDP

Example: Configuring an NTP time server

1) Installing the NTP software

[[email protected] ~]# Yum install-y NTP

2) Edit the NTP configuration file

[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) Turn off SELinux and firewalls

Client testing:

[Email protected] ~]# ntpdate 192.168.87.101

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

[Email protected] ~]#

This article is from the "lyw666" blog, make sure to keep this source http://lyw666.blog.51cto.com/12823216/1957478

Linux Services NTP