Req: how to write and schedule the backup scripts?

i was very good at RMAN backup and EXPDP, IMPDP , physical backups, BUt i don't 
know how to write the scripts for Backup.Can u plz tell me , help me , how to 
write the scripts for backup, then its very helpful to me, i need some guidance 
from experts like you.....

To write backup scripts on Linux/UNIX you need to be fluent with shell 
scripting -- KSH/BASH.

PS: please drop the IM speak it doesn't 
belong in our profession.