[root@localhost ~]# vim /etc/init.d/oracle
#!/bin/bash
#chkconfig:345 61 61
#description:Apache
#
# 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=/opt/oracle/product/19c/dbhome_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 databases:
echo "Starting Oracle Databases ... "
echo "-------------------------------------------------"
date +" %T %a %D : Starting Oracle Databases as part of system up."
echo "-------------------------------------------------"
su - $ORA_OWNER -c "$ORA_HOME/bin/dbstart $ORA_HOME"
echo "Done"

# Start the Listener:
echo "Starting Oracle Listeners ... "
echo "-------------------------------------------------"
date +" %T %a %D : Starting Oracle Listeners as part of system up."
echo "-------------------------------------------------"
su - $ORA_OWNER -c "$ORA_HOME/bin/lsnrctl start"
echo "Done."
echo "-------------------------------------------------"
date +" %T %a %D : Finished."
echo "-------------------------------------------------"
touch /var/lock/subsys/oracle
;;

'stop')
# Stop the Oracle Listener:
echo "Stoping Oracle Listeners ... "
echo "-------------------------------------------------"
date +" %T %a %D : Stoping Oracle Listener as part of system down."
echo "-------------------------------------------------"
su - $ORA_OWNER -c "$ORA_HOME/bin/lsnrctl stop"
echo "Done."
rm -f /var/lock/subsys/oracle

# Stop the Oracle Database:
echo "Stoping Oracle Databases ... "
echo "-------------------------------------------------"
date +" %T %a %D : Stoping Oracle Databases as part of system down."
echo "-------------------------------------------------"
su - $ORA_OWNER -c "$ORA_HOME/bin/dbshut $ORA_HOME"
echo "Done."
echo ""
echo "-------------------------------------------------"
date +" %T %a %D : Finished."
echo "-------------------------------------------------"
;;

'restart')
$0 stop
$0 start
;;
esac