步骤：
1：查看ORACLE_HOME是否设置
$ echo $ORACLE_HOME /u01/app/oracle/product/11.2.0/dbhome_1
2：执行dbstart 数据库自带启动脚本
[oracle@njdzjkdb ~]$ 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/11.2.0/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---. 1 oracle oinstall 6088 1月 1 2000 dbshut -rwxr-x---. 1 oracle oinstall 13892 12月 11 16:01 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/11.2.0/dbhome_1
3：编辑/etc/oratab文件
dbca建库时都会自动创建/etc/oratab文件
将orcl:/u01/app/oracle/product/11.2.0/dbhome_1:N
修改成 orcl:/u01/app/oracle/product/11.2.0/dbhome_1:Y
4：编辑/etc/rc.d/rc.local启动文件，添加数据库启动脚本dbstart
[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/11.2.0/dbhome_1/bin/dbstart
5：重启主机，查看数据库和监听是自启动
6：查看数据库是否处于open状态
select status from v$instance