怎样设置internal 的口令:
You need to protect connect internal by password, even if you are logged in dba group.
Required steps:
1. Create password file in $ORACLE_HOME/dbs
2. Edit your init.ora file:
Fill in parameter REMOTE_LOGIN_PASSWORDFILE = exclusive
See [NOTE:1029539.6] SETTING UP ORACLE PASSWORD (ORAPWD)
3. Edit your sqlnet.ora file:
Fill in parameter SQLNET.AUTHENTICATION_SERVICES = (NONE)