Using a password file is basically one method of authenticating administrators to the database. When the initialization parameter REMOTE_LOGIN_PASSWORDFILE is set to EXCLUSIVE, and a password file has been created, users connecting to the database as SYSOPER or SYSDBA will be prompted for a password. Note that operating system authentication takes precedence over password file authentication. If you belong to the OSDBA or OSOPER group and connect as SYSDBA or SYSOPER, you will be connected with associated administrative privileges regardless of the username/password that you specify. If your userid is not in the OSDBA or OSOPER groups, and you are not in the password file, then the connection will fail.
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