REMOTE_LOGIN_PASSWORDFILE（控制远程连接的时候，能不能使用密码文件）

Property	Description
Parameter type	String
Syntax	REMOTE_LOGIN_PASSWORDFILE= {NONE | SHARED}
Default value	SHARED
Modifiable	No
Basic	Yes
Real Application Clusters	Multiple instances must have the same value.

REMOTE_LOGIN_PASSWORDFILE specifies whether Oracle checks for a password file.

Values:

NONE

Oracle ignores any password file. Therefore, privileged users must be authenticated by the operating system. ---就是说，sys之类的用户，必须通过操作系统认证登录

SHARED

One or more databases can use the password file. The password file can contain SYS as well as non-SYS users.

Note:

The value EXCLUSIVE is supported for backward compatibility. It now has the same behavior as the value SHARED.