Cron Scheduled Tasks

List all Scheduled Tasks

[Email protected] ~]# crontab-l

List specified user task schedules

[Email protected] ~]# crontab-u guo-l

-U: Specify a user, the no-u option is the current user;

-E: Make planning tasks;

-L: Lists scheduled tasks;

-R: Deletes a scheduled task.

3 echo "OK" >/root/cron.log

what does the numeric sub-table for each field mean? From left to right, in order: minute, time, day, month, week, command line. The meaning of the above example is: On June 5 (This day must be 3) 10:01 execute command echo "OK" > /root/cron.log

See if the Crond service is started

[[Email protected] ~]# service Crond Statuscrond (PID 1464) is running ...

If it is a stop state, you need to start it: [[email protected] ~]# service Crond Statuscrond stopped [[email protected] ~]# Service Crond start is starting Crond: Determine

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Cron Scheduled Tasks