Installation problem

Hi all,

Ubuntu 12.04 desktop 64bit

I followed;

1)
How To Install LAMP Server in Ubuntu Server 12.04 LTS
http://ubuntuserverguide.com/2012/05/how-to-install-lamp-server-in-ubuntu-server-12-04-lts.html

2)
How to install WordPress in Ubuntu Server 12.04 LTS Precise Pangolin
http://ubuntuserverguide.com/2012/05/how-to-install-latest-wordpress-in-ubuntu-server-12-04-lts.html

On running;
$ sudo bash /usr/share/doc/wordpress/examples/setup-mysql -n wordpress_preciseserver blog.preciseserver.com
ping: unknown host blog.preciseserver.com

Please advise how to fix this problem? TIA

Regards
satimis