imp icms/password@portaldb file=/home/oracle/icms.dmp fromuser=icms touser=icms ignore=y;

出现 IMP-00058: ORACLE error 12154 encountered 错误。

发现 /opt/oracle/product/11.2.0/db_1/network/admin/目录下没有listener.ora 、sqlnet.ora、  tnsnames.ora三个文件,需要手工添加并且更正文件权限为安装oracle的用户权限 oracle:oinstall。

原因：数据库安装时，没有同时创建数据库实例，只是安装了数据库软件，oracle没有创建默认的网络参数文件，导致imp连接不到数据库的监听器(lsnrctl)。

1.首先关闭数据库:SQL>shutdown immediate;

2.然后重起监听器:LSNRCTL>stop

LSNRCTL>start

3.最后启动数据库:SQL>startup open;

4.各文件内容修改如下：

[oracle@portaldb admin]$ more listener.ora

# listener.ora Network Configuration File: /opt/oracle/product/11.2.0/db_1/network/admin/listener.ora

# Generated by Oracle configuration tools.

LISTENER =

(DESCRIPTION_LIST =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))

(ADDRESS = (PROTOCOL = TCP)(HOST = portal1)(PORT = 1521))

)

)

ADR_BASE_LISTENER = /data/oracle

注意HOST参数需要与系统的hostname一致

[oracle@portal1 admin]$ more sqlnet.ora

# sqlnet.ora Network Configuration File: /opt/oracle/product/11.2.0/db_1/network/admin/sqlnet.ora

# Generated by Oracle configuration tools.

NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)

ADR_BASE = /opt/oracle

[oracle@portal1 admin]$ more tnsnames.ora

# tnsnames.ora Network Configuration File: /opt/oracle/product/11.2.0/db_1/network/admin/tnsnames.ora

# Generated by Oracle configuration tools.

PORTALDB =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = TCP)(HOST = portal1)(PORT = 1521))

(CONNECT_DATA =

(SERVER = DEDICATED)

(SERVICE_NAME = portaldb)

)

)

5.tnsping portaldb查看是否可以正常。