in /etc/init.d are the dbora-file:

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#!/usr/bin/sh
#
# chkconfig: 345 50 49
# description: starts the oracle dabase deamons
#
echo "Oracle 9i auto start/stop"

case "$1" in
'start')

echo "Starting Oracle9i: "
su - oracle -c /oracle/OraHome1/bin/dbstart

echo "Starting the Listener for 9i: "
su - oracle -c "/oracle/OraHome1/bin/lsnrctl start"

touch /var/lock/subsys/oracle9i
echo
;;

'stop')
echo "Shutting Oracle9i: "
su - oracle -c /oracle/OraHome1/bin/dbshut

echo "Shutting down Listener for 9i: "
su - oracle -c "/oracle/OraHome1/bin/lsnrctl stop"

rm -f /var/lock/subsys/oracle9i
echo
;;

'restart')

echo -n "Restarting Oracle9i: "
$0 stop
$0 start
echo
;;

*)
echo "Usage: oracle9i {start | stop | restart }"
exit 1

esac
exit 0

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and in /etc/rc2.d are a link S95oracle -> /etc/init.d/dbora
and in /etc/rc0.d are a link K10oracle -> /etc/init.d/dbora