如果使用TNSPING 时出现
Message 3511 not found; No message file for product=network, facility=TNSMessage 3512 not found; No message file for product=network, facility=TNSMessage 3513 not found; No message file for product=network, facility=TNSMessage 3509 not found; No message file for product=network, facility=TNS
1.ORACLE_HOME 没有指定为tnsping 命令所在的ORACLE根目录
例如应该指向的目录：ORACLE_HOME=/u01/app/oracle/product/11.2.0/db_1
2.ORACLE_HOME/network/admin 没有放入变量环境
