Password error when logging on to database control after Oracle databases are installed

Solution 1 (actual measurement possible):

SYS and SYSTEM user's username and password remember? Try

If not, log on locally with Sqlplus on the server
%sqlplus/as SYSDBA
Sql>alter user system identified by Oracle;
Then use the system user name, password Oracle login to try

Solutions 2

1. Open a Command Window
2. If the Oracle installation directory executes the following command directly in your environment variable, the CD will be executed under the bin of your installation directory
Sqlplus/as SYSDBA
3. Modify the ORCL password
Alter user ORCL identified by ORCL;
4. Test the new password
Connect ORCL/ORCL
5. If successful, go back to the login screen.

Reference article:

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Password error when logging on to database control after Oracle databases are installed