To finish you can install phpsysinfo, this is an application that displays statistics about your hardware and you can access it through the web browser.
To install it you must enter:
sudo apt-get install phpsysinfo
And we make a link between /var/www/phpsysinfo to /home/usuario/web by the following way:
ln -s /var/www/phpsysinfo phpsysinfo
Now We edit the configuration file of phpsysinfo:
sudo nano /etc/phpsysinfo/config.php
If we go to http://IpOfYourServer/phpsysinfo we should see phpsysinfo panel, we can also replace IpOfYourServer by the DynDNS subdomain address.