Linux under Time synchronization

Method 1:

Synchronizing with a known time server

Copy the code code as follows:

Ntpdate time.nist.gov

Where time.nist.gov is a time server.

Delete local time and set time zone to Shanghai

Copy the code code as follows:

Rm-rf/etc/localtimeln-s/usr/share/zoneinfo/asia/shanghai/etc/localtime

Method 2:

Linux Auto Sync time

Vi/etc/crontab

Add one sentence:

Copy the code code as follows:

XX 0 1 * * Root rdate-s time.nist.gov

Where Rdate itself is used to obtain time on the remote time server, with the-s parameter, you can apply the acquired time to the local system.

Configuring the Time server configuration (18.40.33.30)

Copy the code code as follows:

1), # RPM-IVH ntp-4.1.2-4.el3.1.i386.rpm

2), # vi/etc/ntp.conf

Comment Line:

Restrict default Ignore

Add a line:

Copy the code code as follows:

Restrict 18.40.33.0 mask 255.255.255.0 notrust nomodify notrap

3), # Vi/etc/ntp/step-tickers

Add a line:

pool.ntp.org

This will automatically connect to the international Standard Time server each time the ntpd is started;

4), # service NTPD start

5), # Netstat-an |grep 123

Ensure that the port is open in UDP mode

Time Client Configuration (18.40.33.36)

1), # ntpdate 18.40.33.36

Synchronization should be displayed successfully

2), # CROND-E

Join

Copy the code code as follows:

0-59/10 * * * */usr/sbin/ntpdate 192.168.10.1

Synchronize time every 10 minutes

This article is from "Operation and maintenance record Mei Ling" blog, please be sure to keep this source http://meiling.blog.51cto.com/6220221/1652675

Linux under Time synchronization