>Hello,
>
>Im a newbie with Oracle. I downloaded and installed Oracle10g.
>I launched SqlPlus but I dont know what host to use, what user and password to use to connecto to sqlplus session.
>If someone could help me with the sqlplus/oracle config, it would be much appreciated.
>
>Thanks,
>Vlad

Just a WAG, but try User SYSTEM password MANAGER and session LOCAL. If that works, you can add a user:

create user vlad identified by some_password;
grant dba to vlad;