How to confiuge RMAN offline and online back-up at a pre-determined time.

Hallo!I am an Oracle newbie currently studying the Oracle 10g Database Administration Certification.Still very new to Enterprise Manager.
My query is that can you configure an offline database back-up such that you can set up an offline backup at a pre-determined time?
I am assumng a real-office scenario where a DBA would like to have an offline back-up at night e.g. at 1 am when they are no users in the office.If the DBA can set the system such that everday at 1 am ,the instance shuts down,back-up is done e.g a backup set that can be stored on tape,then after backup the instance re-starts itself.All this should be automated such that by the time staff report in the morning ,the instance is up and running and users can work seamlessely
How can I automate this entire process using RMAN and/or Enterprise Manager or a sript to achieve this?Also,I would like to know if you can automate the same for online back-up such that it can backup while instance is still running and users are accessing the DB.
Please help me on this and I shall be infinitely grateful.Thanks in advance.

Hi,
On UNIX server, you can use shell script and sql scripts that can do this job for you. Once the scripts are tested succesfully, you can put them in the crontab.
Crontab entry should reflect the time, day, week, month details as you thought to schedule it.
This link may help you. http://www.dbasupport.com/oracle/scripts/Backup_Recovery/RMAN_Backup/
Regards,
vasu

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