Copying the Library to facebook?

[James864]

I am creating a facebook account and am new to doing this. I am reading a tutorial to do it and it says: Copy the latest version of the php5 client library into your application's directory on the server. What does this mean? It also asks me this stuff:
There are some links to the client library in the downloads section. If you are using a unix shell and are currently in that directory, these commands will work:
wget http://developers.facebook.com/clientlib...orm.tar.gz
tar zxvf facebook-platform.tar.gz
cp facebook-platform/client/facebook.php .
cp facebook-platform/client/facebookapi_php5_restlib.php .
rm -rf facebook-platform.tar.gz facebook-platform
Create an 'appinclude.php' file that you will include at the top of all the php pages in your app. Paste this code. What does this all mean specifically? I think I get the idea but I need help. Are there any other good tutorials for making a facebook app? PLEASE HELP