ORACLE 异常关闭，导致数据库报错 无法连接

1.首先kill掉所有oracle相关的进程

[oracle@oracle11g db_1]$ps -ef|grep $ORACLE_SID
[oracle@oracle11g db_1]$kill -s -9 PID

关闭监听器:

lsnrctl stop

2.用管理员密码登陆sqlplus,运行startup命令

sqlplus "sys/PASSWORD as sysdba"

[oracle@oracle11g db_1]$sqlplus "sys/PASSWORD as sysdba"

SQL*Plus: Release 11.2.0.1.0 Production on Tue Nov 14 13:02:36 2017

Copyright (c) 1982, 2009, Oracle.  All rights reserved.

Connected to an idle instance.

SQL>startup

ORACLE instance started.

Total System Global Area 1586708480 bytes
Fixed Size                  2213736 bytes
Variable Size            1073744024 bytes
Database Buffers          503316480 bytes
Redo Buffers                7434240 bytes
Database mounted.
Database opened.
SQL> exit

3.重启监听器

lsnrctl start