Linux Question
List some important Crontab Commands used in Linux.

Question

Linux Question

List some important Crontab Commands used in Linux.

Accepted Answer

1) Install crontab : crontab -a filename
2) Edit the crontab : crontab -e
3) Command to view crontab entries of current user : crontab -l
4) To remove your crontab tasks : crontab -r
5) Command to execute a cron after every 5 minutes : */5* * * * * /scripts/script.sh

General Syntax for cron : minute(s) hour(s) day(s) month(s) weekday(s) command(s) "Argument1" "Argument2"
If you don't have parameter put star(*)

Description of Cron fields :

minute(0-59) : The exact minute that the command sequence executes
hour (0-23) : The hour of the day that the command sequence executes
day(1-31) : The day of the month that the command sequence executes
month(1-12) : The month of the year that the command sequence executes
weekday(0-6) : The day of the week that the command sequence executes (Sunday = 0, Monday = 1, Tuesday = 2, and so forth)
command(s) : File Path Absolute path CronFile
Argument : Argument (IF you want to pass an argument)

Example : 0 5 * * mon /scripts/script.sh ==> Cron scheduler command helps you to execute the task on every Monday at 5 AM.

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