Linux下Oracle安装两个实例一个监听的配置：

listener.ora文件，

# LISTENER.ORA Network Configuration File: /opt/oracle/product/9.2/network/admin/listener.ora
# Generated by Oracle configuration tools.

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS_LIST =
        (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.101)(PORT = 1521))
      )
      (ADDRESS_LIST =
        (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
      )
    )
  )

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = /opt/oracle/product/9.2)
      (PROGRAM = extproc)
    )
    (SID_DESC =
      (GLOBAL_DBNAME = ora9)
      (ORACLE_HOME = /opt/oracle/product/9.2)
      (SID_NAME = ora9)
    )
    (SID_DESC =
      (GLOBAL_DBNAME = B3)
      (ORACLE_HOME = /opt/oracle/product/9.2)
      (SID_NAME = B3)
    )
  )

tnsnames.ora文件，

# TNSNAMES.ORA Network Configuration File: /opt/oracle/product/9.2/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.

ora9 =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.101)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = ora9)
    )
  )

B3 =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.101)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = B3)
    )
  )

EXTPROC_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
    )
    (CONNECT_DATA =
      (SID = PLSExtProc)
      (PRESENTATION = RO)
    )
  )

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