Two ways to log on to the Oracle Administrator Account

Operating system authentication: by default, you can log on to the operating system to log on to the database as an administrator.

Specific operations:

C: \ Documents ents and Settings \ Administrator> sqlplus/nologsql * Plus: Release 10.2.0.1.0-production on Monday February 20 09:07:29 2012 copyright (c) 1982,200 5, Oracle. all rights reserved. SQL> Conn/As sysdba is connected. SQL> show useruser is "sys"

On Windows, the sqlnet. authentication_services parameter in the $ ORACLE_HOME \ Network \ admin \ sqlnet. ora file is set to ETS or all for operating system authentication. Otherwise, an error will be reported when you use Conn/As sysdba.

Error:
ORA-01031: insufficient Permissions

Note: This logon method is often used by beginners to change the password, especially when the Sys password is forgotten;

Password File authentication: this is a common Administrator (sys) Login