常用命令：
1，lsnrctl status;emctl status dbconsole 打开Database Listener和Database Control
2，connect / as sysdba ;startup nomount;alter dababase mount;alter database open;shutdown immediate; connect sys/oracle as sysdba; startup;0启动实例，装载，打开
3，db_1/install/portlist.ini查看em等端口
4，isqlplusctl start 启动iSQL*Plus