Answer / ramakrishnachallapalli

To take both backups we should keep database in archive log
mode.

Neither cold backup nor hot backup identify the corrupted
blocks in backup where as rman can identify

RMAN will take the backup of database used block only where as
hot backup will take physical existing database files
completely

. I have my backup RMAN script called "backup_rman.sh". I am on the target database. My catalog username/password is rman/rman. My catalog db is called rman. How would you run this shell script from the o/s such that it would run as a background process?

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