Start Oracle DB, Listener at Boot Time

To make the database and listeners start up automatically when the server reboots and shut down automatically when the server shuts down, you’ll need to create a dbora file in /etc/init.d and link it to /etc/rc2.d and /etc/rc0.d. You’ll need to do this as the root user. First create a file called dbora in /etc/init.d as follows as root:
vi /etc/init.d/dbora

#!/bin/sh
# description: Starts and stops Oracle processes 
#
ORA_BASE=/u01/app/oracle
ORA_HOME=/u01/app/oracle/OraHome_1
ORA_OWNER=oracle
if [ ! -f $ORA_HOME/bin/dbstart ]
then
  echo "Oracle startup: cannot start"
  exit
fi
case "$1" in
     'start')
          # Start the Oracle database, listener and Web Control
          su - $ORA_OWNER -c "$ORA_HOME/bin/dbstart"
          su - $ORA_OWNER -c "$ORA_HOME/bin/lsnrctl start"
          su - $ORA_OWNER -c "$ORA_HOME/bin/emctl start dbconsole"
          ;;
     'stop')
          # Stop the Oracle database, listener and Web Control
          su - $ORA_OWNER -c "$ORA_HOME/bin/lsnrctl stop"
          su - $ORA_OWNER -c "$ORA_HOME/bin/emctl stop dbconsole"
          su - $ORA_OWNER -c $ORA_HOME/bin/dbshut
          ;;
esac

Link the script:
ln -s /etc/init.d/dbora /etc/rc2.d/S99dbora      
ln -s /etc/init.d/dbora /etc/rc0.d/K10dbora

Test the script created. To test the script created above, without rebooting do the following:
su - root
/etc/init.d/dbora start     (for startup)
/etc/init.d/dbora stop      (for shutdown)