The system automatically synchronizes time with the internet on a regular basis.

Article Title: the system automatically synchronizes time with the internet on a regular basis. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.

First, let's take a look at the use of crontab, which is not detailed here. You only need to add a line of code in the crontab to specify to run the time synchronization command ntpdate time synchronization server at a certain time.

Detailed configuration is as follows:

Crontab-e (the editing method is the same as vim)

* *** Command

Hour, day, month, and week commands

30 23 *** ntpdate asia.pool.ntp.org

Meaning: perform time synchronization at every night.