$ echo $ORACLE_HOME

/u01/app/oracle/product/11.2./dbhome_1

[oracle@njdzjkdb ~]$ cd $ORACLE_HOME

[oracle@njdzjkdb dbhome_1]$ cd bin/

[oracle@njdzjkdb bin]$ dbstart

ORACLE_HOME_LISTNER is not SET, unable to auto-start Oracle Net Listener Usage: /u01/app/oracle/product/11.2./db_1/bin/dbstart ORACLE_HOME

错误提示：ORACLE_HOME_LISTNER 没有设置

[oracle@njdzjkdb bin]$ ll | grep dbs

-rwxr-x---.  oracle oinstall  1月   dbshut

-rwxr-x---.  oracle oinstall  12月  : dbstart

编辑 dbstart，将ORACLE_HOME_LISTNER=$1修改成 ORACLE_HOME_LISTNER=$ORACLE_HOME 前提是$ORACLE_HOME环境设置正确

[oracle@njdzjkdb bin]$ vi dbstart 

ORACLE_HOME_LISTNER=/u01/app/oracle/product/11.2./dbhome_1

dbca建库时都会自动创建/etc/oratab文件
将orcl:/u01/app/oracle/product/11.2./dbhome_1:N
修改成 orcl:/u01/app/oracle/product/11.2./dbhome_1:Y

[root@njdzjkdb ~]# vi /etc/rc.d/rc.local

#!/bin/bash

# THIS FILE IS ADDED FOR COMPATIBILITY PURPOSES

#

# It is highly advisable to create own systemd services or udev rules

# to run scripts during boot instead of using this file.

#

# In contrast to previous versions due to parallel execution during boot

# this script will NOT be run after all other services.

#

# Please note that you must run 'chmod +x /etc/rc.d/rc.local' to ensure

# that this script will be executed during boot.

touch /var/lock/subsys/local

su oracle -lc "/u01/app/oracle/product/11.2.0/dbhome_1/bin/lsnrctl start"

su oracle -lc /u01/app/oracle/product/11.2./dbhome_1/bin/dbstart

select status from v$instance