This tutorial explains how you can configure Apache2 to set the Expires HTTP header and the max-age directive of the Cache-Control HTTP header of static files (such as images, CSS and Javascript files) to a date in the future so that these files will be cached by your visitors' browsers. This saves bandwidth and makes your web site appear faster (if a user visits your site for a second time, static files will be fetched from the browser cache). This tutorial was written for Debian Squeeze.

This tutorial describes how you can host multiple SSL-encrypted web sites (HTTPS) on one IP address with Apache 2.2 and GnuTLS on a Debian Lenny server.

http://www.howtoforge.com/hosting-multiple-ssl-web-sites-on-one-ip-address-with-apache-2.2-and-gnutls-debian-lenny

Varnish is an open source "web accelerator" which you can use to speed up your website. It can cache certain static elements, such as images or javascript but you can also use it for other purposes such as Loadbalancing or some additional security. In this tutorial we will focus on the latter one. In this mode, Varnish will stop incomplete HTTP requests from reaching your Apache webserver.

http://www.howtoforge.com/putting-varnish-in-front-of-apache-on-ubuntu-debian

This article explains how you can cache your web site contents with Apache's mod_cache on Debian Lenny. If you have a high-traffic dynamic web site that generates lots of database queries on each request, you can decrease the server load dramatically by caching your content for a few minutes or more (that depends on how often you update your content).

http://www.howtoforge.com/caching-with-apaches-mod_cache-on-debian-lenny

This tutorial shows how you can run your own name server for domains that you register with fasthosts.com. Of course, this works with every other registrar as well, although the procedure might differ a little bit. We will use the ISPConfig 3 server as the primary name server and also acting as the secondary. This may be suited best to a single server setup. To do this, you need one server with ISPConfig 3 installed and a Fast hosts account.

http://www.howtoforge.com/how-to-run-your-own-name-server-with-ispconfig-3-and-fast-hosts