centos 6.4 oracle 11g autorun auto start

http://matthiashoys.wordpress.com/2012/04/20/automatically-start-oracle-11g-on-oracle-linux-6-2-after-server-reboot/

/etc/oratab

#

# This file is used by ORACLE utilities.  It is created by root.sh
# and updated by either Database Configuration Assistant while creating
# a database or ASM Configuration Assistant while creating ASM instance.

# A colon, ':', is used as the field terminator.  A new line terminates
# the entry.  Lines beginning with a pound sign, '#', are comments.
#
# Entries are of the form:
#   $ORACLE_SID:$ORACLE_HOME:<N|Y>:
#
# The first and second fields are the system identifier and home
# directory of the database respectively.  The third filed indicates
# to the dbstart utility that the database should , "Y", or should not,
# "N", be brought up at system boot time.
#
# Multiple entries with the same $ORACLE_SID are not allowed.
#
#
oratst:/u01/app/oracle/product/11.2.0/db_1:Y

$ su – oracle

$ vi /home/oracle/scripts/ora_start.sh

#!/bin/bash

# script to start the Oracle database, listener and dbconsole

. ~/.bash_profile

# start the listener and the database
$ORACLE_HOME/bin/dbstart $ORACLE_HOME

# start the Enterprise Manager db console
$ORACLE_HOME/bin/emctl start dbconsole

exit 0

$ vi /home/oracle/scripts/ora_stop.sh

#!/bin/bash

# script to stop the Oracle database, listener and dbconsole

. ~/.bash_profile

# stop the Enterprise Manager db console
$ORACLE_HOME/bin/emctl stop dbconsole

# stop the listener and the database
$ORACLE_HOME/bin/dbshut $ORACLE_HOME

exit 0

$  chmod u+x ora_start.sh ora_stop.sh

- root

$ vi /etc/init.d/oracle

#!/bin/bash
# chkconfig: 345 99 10
# description: Oracle auto start-stop script.

# Set ORA_OWNER to the user id of the owner of the
# Oracle database in ORA_HOME.

ORA_OWNER=oracle
RETVAL=0

case "$1" in
    'start')
        # Start the Oracle databases:
        # The following command assumes that the oracle login
        # will not prompt the user for any values
        su - $ORA_OWNER -c "/home/oracle/scripts/ora_start.sh"
        touch /var/lock/subsys/oracle
        ;;
    'stop')
        # Stop the Oracle databases:
        # The following command assumes that the oracle login
        # will not prompt the user for any values
        su - $ORA_OWNER -c "/home/oracle/scripts/ora_stop.sh"
        rm -f /var/lock/subsys/oracle
        ;;
    *)
        echo $"Usage: $0 {start|stop}"
        RETVAL=1
esac
exit $RETVAL

$ chmod 750 /etc/init.d/oracle

$ chkconfig --add oracle