how to install magento

I've made ​​a domain with the name habasy.com
and I use FreeDNS of centoswebpanel.

my domain directory is "/ home / habasy / public_html /"
I want to install magento on my domain directory.

I have uploaded the file to the directory of my domain.
but when I access my domain "habasy.com"
warning appears "Internal Server Error" as shown below.

please help me solve this.

use this tutorial:

How to change ownership on the files and folders
http://forum.centos-webpanel.com/php/suphp-500-internal-server-error/

it has not helped my problem
Can you help to configure it
I will give username and password.

you can contact support
http://centos-webpanel.com/contact

ok, My problem has been resolved
just simple like this
(for everyone)
change this

in Centos webpanel admin
apache setting --> edit apache vhosts

edited
<Directory "/">
        AllowOverride All
</Directory>

to

<Directory "/home/yourweb or user/public_html">
        AllowOverride All
</Directory>

example
my domain is "habasy"

<Directory "/home/habasy/public_html">
        AllowOverride All
</Directory>

save change
and open service SSH -->> send Shell Command

service httpd restart

and now refresh your browser.
just it
thanks for all

great, this fix will be added i new update.