Automatic statrup & shutdown

Question

below are the stapes to startup and shutdown oracle 9i database ... but what if i have multiple oracle home and i want to do startup and shutdown automatic for both oracle 9i and 10g databases...?
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In the /etc/init.d directory, create a dbora script similar to the following, if it does not already exist. Be sure to give the full path of the dbstart utility.
#!/bin/sh
# Set ORA_HOME to be equivalent to the $ORACLE_HOME
# from which you wish to execute dbstart and dbshut;
# Set ORA_OWNER to the user id of the owner of the
# Oracle database in ORA_HOME.
ORA_HOME=/u01/app/oracle/product/9.2.0.1.0
ORA_OWNER=oracle
if [! -f $ORA_HOME/bin/dbstart]
then
echo "Oracle startup: cannot start"
exit
fi
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 $ORA_HOME/bin/dbstart &
'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 $ORA_HOME/bin/dbshut &
esac
Create symbolic links to the dbora script in the appropriate run-level script directories, as follows:
# ln -s /etc/init.d/dbora /etc/rc0.d/K10dbora
# ln -s /etc/init.d/dbora /etc/rc3.d/S99dbora
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Answer 1

It depends how You modified dbshut script.
For example mine is like this and it is checking /etc/oratab for all sids there is parameter Y and shutdowns them.
cat $ORATAB | while read LINE
do
case $LINE in
\#*) ;; #comment-line in oratab
if [ "`echo $LINE | awk -F: '{print $NF}' -`" = "Y" ] ; then
ORACLE_SID=`echo $LINE | awk -F: '{print $1}' -`
if [ "$ORACLE_SID" = '*' ] ; then
ORACLE_SID=""
fi
export ORACLE_SID
STATUS=1
pmon=`ps -ef | egrep pmon_$ORACLE_SID | grep -v grep`
if [ "$pmon" = "" ];
then
STATUS="-1"
echo "Database \"${ORACLE_SID}\" was down."
fi
if [ $STATUS = "1" ] ; then
$ORACLE_HOME/bin/sqlplus<<EOF
conn / as sysdba
shut immediate
EOF
echo " "
echo " "
echo "Database \"${ORACLE_SID}\" downed."
echo " "
echo " "
fi
fi
esac
done