Scheduled task cron command and cron command

Scheduled task cron command and cron command

A beginner in linux, because the project needs to learn the linux operating system now.

A scheduled task is required for the project to access a url every hour. You can learn how to use the crontab command by referring to many blogs.

Crontab-u root-l # query the currently executed cron command

Crontab-u root-e # edit a scheduled task

Create scheduled task

* *** Command
The 1st column indicates minute 1 ~ 59, represented by * or */1 per minute
The first column indicates the hour 1 ~ 23 (0 indicates 0 points)
The 3rd column indicates the date 1 ~ 31
The 4th column indicates the month 1 ~ 12
The Identification Number of column 5th is from day of the week to day ~ 6 (0 indicates Sunday)
6th columns of commands to run

For example, 01 **** curl www.baidu.com indicates that the first minute of every hour accesses Baidu