Crontab Scheduled Tasks

# View Crontab Service status

Service Crond Status


# Open crontab Service

/etc/init.d/crond start

# config file for crontab

/etc/crontab

SHELL=/bin/bash
Specifies which shell the system will use

PATH=/sbin:/bin:/usr/ sbin: / usr / bin
Specifies the path of the System execution command

MAILTO=root
Specifies that the task execution information for Crond will be sent to the root user by mail

HOME=/
Specify the home directory to use when executing a command or script





/etc/Cron.Deny represents a user who cannot use the crontab command

/etc/Cron.allowrepresents a user who can use crontab

The Cron.allow file does not exist by default
If two files exist at the same time, then/etc/Cron.allow Priority
If none of the two files exist then only root can be used

Cron.DenyThe file is empty by default

/var/Spool/Cron/A directory of all user crontab information, named after the user name








# executes every 2 minutes
*/2*** *


# Executes once every 1 hours
0****

* once daily 2 o'clock in the morning 30
* * *

Crontab Scheduled Tasks