Unable to auto start database/listener/EM on Oracle Enterprise Linux 5

Question

All Experts
I have install oracle 11g on Oracle Enterprize Linux 5 successfully.
done all post installating steps, but when i restart server oracle listener/database/EM not automatically start.
Please guide what is wron (server dbora error: /bin/sh: :No such file or directory).
1. Log in as the root user
2. Edit the oratab file (SID=Y)
3. Create a file called dbora
4.Run chmod and chgrp on the dbor file
# chgrp dba dbora
# chmod 750 dbora
6.Creat symbolic links to the dbora script
# ln -s /etc/init.d/dbora /etc/rc.d/rc0.d/K01dbora
# ln -s /etc/init.d/dbora /etc/rc.d/rc3.d/S99dbora
# ln -s /etc/init.d/dbora /etc/rc.d/rc5.d/S99dbora
7. add service
# chkconfig --add dbora
# chkconfig –list dbora
0:off 1:off 2:off 3:on 4:off 5:on 6:off
# ls -l /etc/rc*.d/*dbora
# !/bin/sh -X
# chkconfig: 35 99 10
# description: Start and stop the Oracle database, listener, EM, and iSQLPlus
# Change the value of ORACLE_HOMe to specify the correct Oracle Home Firectory for your installation.
# Change the value of ORACLE to the login name of the oracle owner at your site
ORACLE_HOME=/oradisk/app/oracle/product/11.1.0/db
ORACLE=oracle
PATH=${PATH}:$ORACLE_HOME/bin
HOST="hostname"
PLATFORM="uname"
export ORACLE_HOME PATH
if [ ! -f $ORACLE_HOME/bin/dbstart ]
then
echo "Oracle startup: cannot start"
exit
fi
case $1 in
'start')
su - $ORACLE -c "$ORACLE_HOME/bin/dbstart $ORACLE_HOME"
'stop')
su - $ORACLE -c "$ORACLE_HOME/bin/dbshut $ORACLE_HOME"
echo "usage: $0 {start|stop}"
exit
esac
exit

Answer 1

does the script work when you log on to your freshly started system, logon as root and execute /etc/init.d/dbora start?
the script does not have to have group membership of the dba group.
also, do not create symlinks yourself.
by adding the service using chkconfig the script is started and stopped as indicated by chkconfig --list, no need to do additional steps like creating symlinks.