Cron is a unix, solaris utility that allows tasks to be automatically run in the background at regular intervals by the cron daemon. These tasks are often termed as cron jobs in unix , solaris. Crontab (CRON TABle) is a file which contains the schedule of cron entries to be run and at specified times.
There are several special predefined values which can be used to substitute the CRON expression.
A crontab file has five fields for specifying day , date and time followed by the command to be run at that interval.
This guide how to disable with view and edit user cron job:
crontab: usage error: only one operation permitted
usage: crontab [-u user] file
crontab [-u user] [ -e | -l | -r ]
(default operation is replace, per 1003.2)
-e (edit user’s crontab)
-l (list user’s crontab)
-r (delete user’s crontab)
-i (prompt before deleting user’s crontab)
-s (selinux context)
Check User Crontab:
crontab -u [user] -l
Edit User Crontab:
crontab -u [user] -e