Encountered 'ora-01017: invalid username/password; logon denied'. how to solve?

This error is straightforward: you are trying to log in with an incorrect username or password.

Example:

ORA-01017: invalid username/password; logon denied

Solution:

1. Double-check your credentials.
2. Ensure that the account is not locked.
3. If using a password file, ensure it's correctly set up.