How to get username and password for oracle 9i database?

[Asha R]

I am just now learning oracle!
Recently i have installed oracle9i
And i forgot the username,passwo rd,host string!
Help me!

thanks!

[ramanan ram]

select * from dictionary;
u can get all information about oracle .
for username:
select * from dba_objects; or select * from all_objects;or select * from dba_users;
host string:
select * from dba_db_links; or select * from all_db_links