If you have followed the instructions on Setting up LAMP (Linux Apache, MySQL, and PHP) correctly, installing Webmin would be useful to manage your entire server using a web interface. Well teach you how to do it in a breeze.
I will be using the IP address 192.168.0.10 for reference. You must change it to your correct IP or domain for it to work.
1. First, edit your sources.list
Include this repository:
deb http://download.webmin.com/download/repository sarge contrib
deb http://webmin.mirror.somersettechsolutions.co.uk/repository sarge contrib
2. Install the signing key:
apt-key add jcameron-key.asc
3. Initiate update and install Webmin:
apt-get install webmin
4. After installation, you could then login to your Webmin Panel at https://192.168.0.10:10000
Now, how about Installing Zend Optimizer on your server?