How to execute a script in FreeNAS

Using Script in Freenas consists of a few steps:
1. Creating file
2. Apply correct permissions
3. Run script in CLI
4. Run script as a CRON job.

AD.1 How to create the file:
In Advanced|Execute command You type:

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touch /mnt/YOUR_MOUNT_NAME/YOUR_SCRIPT_NAME.sh

AD.2 Correct permissions:
In Advanced | Execute command type:

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chmod u+x /mnt/YOUR_MOUNT_NAME/YOUR_SCRIPT_NAME.sh

AD.3 Run script from CLI
*********** TO VERIFY ***********

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#/bin/sh /mnt/YOUR_MOUNT_NAME/YOUR_SCRIPT_NAME.sh

AD.4 Add script to Cron
In System|Advanced|Cron add new job.
As command put :

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/mnt/YOUR_MOUNT_NAME/YOUR_SCRIPT_NAME.sh

UPDATE:
Additionally if Cron failed to run the script you can try;

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/bin/bash -x

at the beggining of the script line ie:

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/bin/bash -x /mnt/YOUR_MOUNT_NAME/YOUR_SCRIPT_NAME.sh

After running this command You should get: The cron job has been executed successfully.