What is up with the user name and pass in my config.php file?

Ok to make this short and sweet I have VBulleting working great on my website at www.vorspann.net however I am just curious because a few things are wierd in my config.php file...

It asked for my username and password when installing and I tried entering my username which was Chris Jumonville and my password which was ********** but it wouldnt install. I went with the default settings which were exactly as follows...

// username and password to log onto db server
$dbusername="root";
$dbpassword="";

Umm ok that is basically saying that I dont have a name or password?

Well I installed it and it worked just like that without any problems. I know that those ARE NOT my MySQL password and username for a fact. It will also ONLY work with my server name as "localhost". My only guess for this would be that since I run my own server which is a DNS server, web server and everything and I dont use any hosting services that it uses localhost as the server name since it is my local computer and that it uses the root for name and nothing for the password because this is all hosted on my own computer which I am installing vBulletin on. I imagine the only time the user name and password would be relavant and a server name as well would be if you were using a hosting service? Is this right or is something wierd just going on? All things said however vBulletin works 100% great.

Can anyone explain this to me?

Thanks
Chris

[assassingod]

IIRC = If I Recall(or Remember) Correctly

[Issvar]

Mysqladmin is not mysql, the passwords in one have nothing to do with the other.

Read the documentation for mysql (and for your dns server, webserver, etc).

Run mysql from the commandline to be able to configure it.

In the future read the documentation before you run something, it's likely anyone can read and write files on your harddisk now.

[Erwin]

Set a root password immediately - if your mysql database is chown by root as well, then obviously root can connect too.