Shell script for auto start of oracle and listener at boot time

Step 1. Edit /etc/oratab file.
# vi /etc/oratab
prim:/u01/app/oracle/product/11.2.0/db_1:Y

:wq

Step 2. Create a file called "/etc/init.d/dbora" as the root user

vi /etc/init.d/dbora

#!/bin/bash
# chkconfig: 345 99 10
# description: Oracle auto start-stop script.
ORA_HOME=/u01/app/oracle/product/11.2.0/db_1
ORA_OWNER=oracle
if [ ! -f $ORA_HOME/bin/dbstart ]
then
    echo "Oracle startup: cannot start"
    exit
fi
case "$1" in
    'start')
        su $ORA_OWNER -c $ORA_HOME/bin/dbstart &
        su - $ORA_OWNER -c "$ORA_HOME/bin/lsnrctl start" &
        touch /var/lock/subsys/dbora
        ;;
    'stop')
        su - $ORA_OWNER -c "$ORA_HOME/bin/lsnrctl stop"
        su $ORA_OWNER -c $ORA_HOME/bin/dbshut
        rm -f /var/lock/subsys/dbora
        ;;
esac

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Step 3. Give dbora file proper permission .
chmod 750 /etc/init.d/dbora
chkconfig --add dbora