MYSQL Configuration problems thanks for help

[Maxime Legrand]

Hello,

I am a new mYSQL user and I have successfully installed the MYSQL V5.5.19 engine. I can start it and I get:
111222 11:24:29 [Note] mysqld: ready for connections.
Version: '5.5.19' socket: '' port: 3306 MySQL Community Server (GPL)

Now, if I follow the documentation I can use for example SHOW DATABASES in mysql command;
But as result I get:
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
+--------------------+
1 row in set (0.00 sec)

Therefore, I am looking for the script install_db?

And also I need to create users and list the exisitng users.
If i use show --users, I get:
mysql> show grants;
+--------------------------------------+
| Grants for @localhost |
+--------------------------------------+
| GRANT USAGE ON *.* TO ''@'localhost' |
+--------------------------------------+
1 row in set (0.00 sec)

I hope you can answer me and give some recommandations and help.
Thanks in advance.