Shell Script for RMAN Backup

Here's a simple shell script for taking RMAN Backup

#!/bin/sh
ORACLE_HOME=/u01/app/oracle/product/11.2.0/db_home
ORACLE_SID=indigo
LD_LIBRARY_PATH=$ORACLE_HOME/lib:$LD_LIBRARY_PATH; export LD_LIBRARY_PATH
NLS_LANG=American_America.UTF8; export NLS_LANG
export ORACLE_HOME;
PATH=$ORACLE_HOME/bin:$PATH; export PATH

sdate=/bin/date
DAY=`$sdate +%d` #1-30/31
HOUR=`$sdate +%H` # HOURS: 0-23
DATE=`$sdate +%h_%d_%Y` # Date as Nov_16_2010
MONTH=`$sdate +%m` #Month 01-12
YEAR=`$sdate +%Y`
thisdate=`$sdate +%d%b%y`
thisminute=`$sdate +%H%M`
backupdate=`$sdate +%Y%m%d`
mkdir -p /b01/rman_backups/indigo/${YEAR}_${MONTH}_${DAY}_${HOUR}


$ORACLE_HOME/bin/rman target 'sys/passwd@indigo catalog rman/rman@rman' << EOF > /b01/rman_backups/indigo/logs/Indigo_FULL_BACKUP_${DATE}_${thisminute}
run{
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO ' /b01/rman_backups/indigo/${YEAR}_${MONTH}_${DAY}_${HOUR}/%F';
ALLOCATE CHANNEL c1 DEVICE TYPE disk;
ALLOCATE CHANNEL c2 DEVICE TYPE disk;
ALLOCATE CHANNEL c3 DEVICE TYPE disk;
ALLOCATE CHANNEL c4 DEVICE TYPE disk;
backup full database tag INDIGO_FULL format ' /b01/rman_backups/indigo/${YEAR}_${MONTH}_${DAY}_${HOUR}/%d_%T_%s_%p_FULL';
sql 'alter system archive log current';
backup tag INDIGO_ARCHIVE format ' /b01/rman_backups/indigo/${YEAR}_${MONTH}_${DAY}_${HOUR}/%d_%T_%s_%p_ARCHIVE' archivelog all;
backup tag INDIGO_CONTROL current controlfile format ' /b01/rman_backups/indigo/${YEAR}_${MONTH}_${DAY}_${HOUR}/%d_%T_%s_%p_CONTROL';
release channel c1;
release channel c2;
release channel c3;
release channel c4;
}
EOF
exit