1、修改/etc/oratab的orcl:/u01/app/oracle/product/19.3.0/db_1:Y，将原来的N改成Y

2、在/etc/init.d目录下创建oracle的文件，在文件中添加如下内容：
#!/bin/sh

chkconfig: 35 80 10

description: Oracle auto start-stop script.

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/19.3.0/db_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 “-------------------------------------------------” >> /var/log/oracle
date +” %T %a %D : Starting Oracle Databases as part of system up." >> /var/log/oracle
echo “-------------------------------------------------” >> /var/log/oracle
su - $OR{A}_{O}WNER-c"$ORA_HOME/bin/dbstart" >>/var/log/oracle
echo “Done”

Start the Listener:

echo “Starting Oracle Listeners … "
echo “-------------------------------------------------” >> /var/log/oracle
date +” %T %a %D : Starting Oracle Listeners as part of system up." >> /var/log/oracle
echo “-------------------------------------------------” >> /var/log/oracle
su - $OR{A}_{O}WNER-c"$ORA_HOME/bin/lsnrctl start" >>/var/log/oracle
echo “Done.”
echo “-------------------------------------------------” >> /var/log/oracle
date +" %T %a %D : Finished." >> /var/log/oracle
echo “-------------------------------------------------” >> /var/log/oracle
touch /var/lock/subsys/oracle
;;

‘stop’)

Stop the Oracle Listener:

echo “Stoping Oracle Listeners … "
echo “-------------------------------------------------” >> /var/log/oracle
date +” %T %a %D : Stoping Oracle Listener as part of system down." >> /var/log/oracle
echo “-------------------------------------------------” >> /var/log/oracle
su - $OR{A}_{O}WNER-c"$ORA_HOME/bin/lsnrctl stop" >>/var/log/oracle
echo “Done.”
rm -f /var/lock/subsys/oracle

Stop the Oracle Database:

echo “Stoping Oracle Databases … "
echo “-------------------------------------------------” >> /var/log/oracle
date +” %T %a %D : Stoping Oracle Databases as part of system down." >> /var/log/oracle
echo “-------------------------------------------------” >> /var/log/oracle
su - $OR{A}_{O}WNER-c"$ORA_HOME/bin/dbshut" >>/var/log/oracle
echo “Done.”
echo “”
echo “-------------------------------------------------” >> /var/log/oracle
date +" %T %a %D : Finished." >> /var/log/oracle
echo “-------------------------------------------------” >> /var/log/oracle
;;

‘restart’)
$0 stop
$0 start
;;
esac

此处的ORA_HOME=/u01/app/oracle/product/19.3.0/db_1，修改成oracle安装目录
3、在/etc/rc.d/rc.local文件中添加如下内容

su - oracle -c “lsnrctl start”
su - oracle -c “dbstart”

4、设置开机自启动：
systemctl enable oracle
5、重新启动设置完成

注：借鉴https://blog.csdn.net/zhongchunmei/article/details/128495908