oracle导出数据库报的错：EXP-00056 遇到 ORACLE 错误 12154

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给新来的同事导数据库，
oracle配置文件如下：

# 本地数据库

ORCL_LOCAL =
  (DESCRIPTION =

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

    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME= orcl)
    )
  )

cmd命令下，exp testutf1/testutf@orcl file=s:\ebs.dmp full = y
报错：
***EXP-00056 :遇到 ORACLE 错误 12154
ORA-12154: TNS ：无法解析指定的连接标识符
EXP-00000:导出终止失败*

网上给出办法基本有三：
一、tnsnames.ora 文件中orcl实例名对应了多个ip地址,就是这种情况：

# 本地数据库

ORCL_LOCAL =
  (DESCRIPTION =

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

    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME= orcl)
    )
  )
# 41数据库

ORCL_TEST_41 =
  (DESCRIPTION =

      (ADDRESS = (PROTOCOL =TCP )(HOST = 192.168.41.1)(PORT = 1521))

    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME= orcl41)
    )
  )

二、先set oracle_sid = orcl 再执行导出命令、
三、oracle服务没打开
window+R ->services.msc->打开服务管理界面、oracle的七个服务

以上三个办法我都试了、不行
四、本机运行、不用加@orcl
连接远程服务器加@服务器名，
所以、直接exp testutf1/testutf file=s:\ebs.dmp full = y就搞定了