1.      Create a Cron entry to run backup.sh everyweek day and send output to Backup.log.file

2.      Create a cron tentry to run invoice.sh every 1^st day of the month and output to invoice log

3.      Create cron entry to send email result to admin@aoss.org

4.      Create corn entry to run something.sh every 1 hour.

1. Load crontab from the table named “invoice.cron”
2. List Exisiting crontab entry
3. Remove Exisiting crontab entry