[oracle@primary ~]$ vi /data/backup.sh

export  ORACLE_BASE=/u01/app/oracle
export  ORACLE_HOME=$ORACLE_BASE/product/10.2.0/db_1
export  ORACLE_SID=orcl
export  PATH=$PATH:$HOME/bin:$ORACLE_HOME/bin

rman target / nocatalog msglog /data/flash_recovery_area/backup.log append <RUN {
crosscheck backupset;
delete noprompt expired backupset;
ALLOCATE CHANNEL ch00 TYPE DISK;
BACKUP
    full
    FORMAT '/data/flash_recovery_area/bk_%s_%p_%d_%T.bk'
    DATABASE;
    sql 'alter system archive log current';
RELEASE CHANNEL ch00;
}
EOF

#####################################################

[oracle@primary ~]$ crontab -l
23 15 * * * sh /data/backup.sh
[oracle@primary ~]$ crontab -e

23 15 * * * sh /data/backup.sh

###########################################################
$rman target /

RMAN>backup full format  '/data/%U’  database;

RMAN> backup device type disk format '/data/%U' database plus archivelog;

RMAN> backup device type disk format '/data/%U' current controlfile for Standby;