crontab Command

Crontab is a Linux utility used to schedule repetitive tasks to run automatically at specified intervals. Here are some examples of how to use the crontab command:

To edit your crontab file, use the following command: crontab -e. This opens the crontab file in the default editor for you to add or edit scheduled tasks.
To list the current crontab tasks for the current user, use the following command: crontab -l.
To remove the current user’s crontab, use the following command: crontab -r.
To add a new task to the crontab, you can use the following command: crontab -e, then enter the task in the following format on a new line:
* * * * * command - - - - - | | | | | | | | | ----- Day of week (0 - 7) (Sunday = both 0 and 7) | | | ------- Month (1 - 12) | | --------- Day of month (1 - 31) | ----------- Hour (0 - 23) ------------- Minute (0 - 59)
For example, the following command will run the script.sh file every day at 3:30am: 30 3 * * * /path/to/script.sh

Please note that the above examples are for simplification, crontab accept more than one arguments and in most cases, it requires editing and knowledge on the file system where the script or command is located. It is advisable to test the command or script before putting it in the crontab.

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