Wel I already did it.
I tried with username SYSTEM and SYS and I could login.
I thought there would be a personalized username, thus my confusion.
I don't know how to change the password via SQL Plus.
I am a newbie. I used to be a Data Administrator but a DBA is a lot different.
Do you know of a good tutorial for Oracle 11g?
Thank you.
Mário van Grichen