crontab example in linux 

Find Below example for crontab linux example.
# Minute   Hour   Day of Month       Month          Day of Week        Command    
# (0-59)  (0-23)     (1-31)    (1-12 or Jan-Dec)  (0-6 or Sun-Sat)                
    0        4          1             *               0           /usr/bin/example
This line executes the "example" command at 4AM on the 1st of every month that a Sunday falls on.
The -l option causes the current crontab to be displayed on standard output.
The -r option causes the current crontab to be removed.
The -e option is used to edit the current crontab using the editor specified by the VISUAL or EDITOR environment variables.
 

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