写了个小脚本，用在DG备端开机自启动:
~~~
#!/bin/sh
#db auto be mount status when os restart
#20151224
su - oracle -c 'sqlplus / as sysdba'<<EOF
startup nomount;
alter database mount standby database;
alter database recover managed standby database using current logfile disconnect from session;
EOF
su - oracle -c 'lsnrctl start'
~~~
写到一个sh文件中，给x权限，然后把脚本放到rc.local里，就可以了！！
