vim /etc/oratab

将里面 最后一句话设置从N 修改为Y 允许启动

ORA19C:/opt/oracle/product/19c/dbhome_1:Y

# This file is used by ORACLE utilities.  It is created by root.sh

# and updated by either Database Configuration Assistant while creating

# a database or ASM Configuration Assistant while creating ASM instance.

# A colon, ':', is used as the field terminator.  A new line terminates

# the entry.  Lines beginning with a pound sign, '#', are comments.

#

# Entries are of the form:

#   $ORACLE_SID:$ORACLE_HOME:<N|Y>:

#

# The first and second fields are the system identifier and home

# directory of the database respectively.  The third field indicates

# to the dbstart utility that the database should , "Y", or should not,

# "N", be brought up at system boot time.

#

# Multiple entries with the same $ORACLE_SID are not allowed.

vim /usr/bin/oracle.sh

增加的内容为:

#! /bin/bash

#  script  For oracle19c.service

/opt/oracle/product/19c/dbhome_1/bin/lsnrctl start

/opt/oracle/product/19c/dbhome_1/bin/dbstart /opt/oracle/product/19c/dbhome_1

chmod  /usr/bin/oracle.sh

vim /etc/systemd/system/oracle19c.service

编辑添加内容为:

[Unit]
Description=Oracle19c
After=syslog.target network.target

[Service]
LimitMEMLOCK=infinity
LimitNOFILE=65535
Type=oneshot
RemainAfterExit=yes
User=oracle
Environment="ORACLE_HOME=/opt/oracle/product/19c/dbhome_1"
ExecStart=/usr/bin/oracle.sh

[Install]
WantedBy=multi-user.target

systemctl enable oracle19c