Websites hosted through your GMU account
GMU's MASON cluster has a web server and allows you to create web pages. ITU maintains a web page describing how to set up a website on the MASON cluster, and a web site describing how to do web development there.
Websites hosted through your CS account
The CS Cluster also can host web pages. To set up a website, first create a directory called public_html in your home directory, and make it accessible. You can do this with the following commands:
cd ~
mkdir public_html
chmod ugo+rx public_html
touch public_html/index.html
You then have to send email to help help /@/ cs.gmu.edu and inform them that you'd like your public_html directory set up appropriately. It'll take a few days.
This creates the top-level directory for your website. If your account is called foo, then to access the file public_html/bar.html, use the URL http://cs.gmu.edu/~foo/bar.html The provided index.html file is your home page (modify it as you like), and will be accessible as http://cs.gmu.edu/~foo
(Note that this will make files in your public_html website directory readable by anyone; for slightly tighter restrictions, send mail to help /@/ cs.gmu.edu)