Set Time Synchronization in linux

The time of the newly installed linux system is always different from the actual time. After a good time, as the system runs, it will be different from the time. Therefore, you need to synchronize the time with the standard time server. Ntp is a software installed in linux.
This section describes how to use ntp as the client to synchronize with the standard time server.
0. The ntpd service cannot be started before installation, because ntpd is a server, ntpdate is a client, and both cannot run simultaneously.
1. Because the time server (pool.ntp.org) is used, you must first set up the dns server.
Echo "nameserver 202.106.0.20">/etc/resolv. conf
2. manual synchronization
/Usr/sbin/ntpdate pool.ntp.org 3. Set the command to synchronize the time every one hour:
Crontab-e # Add 0 */1 ***/usr/sbin/ntpdate pool.ntp.org 2> & 1>/tmp/ntp. log;/sbin/hwclock-w
The first command is the synchronization time.
The second sentence is to write the time into the system hardware clock, so that the system does not have a wrong time after restart.