Linux System Service cron

System Service is an application type that runs in the background. Service applications can provide some functions locally and over the network,LinuxIn System ServiceCronThis feature is available.

Cron process introduction:

The cron process provides a function for Linux users to automatically execute tasks after a certain interval. Cron is usually responsible for starting jobs in the at queue.

This process obtains information from the crontab file. each user has an independent crontab file.

Run the crontab-l command to view the list of ordered commands.

To change cron information, you must create a crontab file. Crontab has a fixed format. Valid rows include six regions, namely:

Minute 0-59), hour 0-23), Day 1-31), Month 1-12), week 0-7, 0 and 7 represent Sunday ), command)

Each region can contain an asterisk, indicating the entire interval. Each region can contain a range in the form of x-y or a list separated by commas.

This article introduces cron in Linux system services. I hope you can understand him and he will help you in the future.

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