错误详细描写叙述：

ERROR:

ORA-01034: ORACLE not available

ORA-27101: shared memory realm does not exist

进程 ID: 0

会话 ID: 0 序列号: 0

解决方案：

1.运行

[oracle@AY140316135826Z admin]$ sqlplus ‘sys/Hello54987663@localhost:1521/orcl as sysdba‘

2.运行：

SQL>startup

3.測试一下：

SQL>select * from user_tables;

ok显示除了非常多结果！

此时tnsnames.ora内容：

# tnsnames.ora Network Configuration File: /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/tnsnames.ora# Generated by Oracle configuration tools.orcl =  (DESCRIPTION =    (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))    (CONNECT_DATA =      http://www.mamicode.com/(SID = orcl)>

listener.ora内容：
# listener.ora Network Configuration File: /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora# Generated by Oracle configuration tools.LISTENER =  (DESCRIPTION_LIST =    (DESCRIPTION =      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))      (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))    )  )SID_LIST_LISTENER=  (SID_LIST=	(SID_DESC=         (GLOBAL_DBNAME=orcl)         (SID_NAME=orcl)			         (ORACLE_HOME=/u01/app/oracle/product/11.2.0/dbhome_1/)       )      )

 
 
附录：
oracle监听启动运行：
lsnrctl start