WP Built-in Object Cache

Did you know Wordpress will try and cache all kinds of database queries as files on disk? It’s so simple. Just add the following to your wp-config.php:

// Enable the WordPress Object Cache:

define(ENABLE_CACHE, true);

This can give a noticeable and immediate performance benefit. Less queries = less overhead and more CPU to go do other things. In case you don’t believe me, I just had a guy whose load average was between 20 and 50. After making this tiny change, it dropped to 2.

WP-Cache

You’ve seen this before, but if you’re not using the  WP Super Cache plugin, we shouldn’t talk. It serializes your posts to a file on disk and later spits them back. It’s the classic caching solution. It also knows how to update itself when comments are received, etc, so your site is always the most up to date. Currently 304 posts are cached on this site in the last hour.
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One of the many virtualization options for Linux is OpenVZ, the free software component of SWsoft’s Virtuozzo. OpenVZ, and Virtuozzo, are OS-level virtualization solutions that allow you to partition servers into multiple virtual private servers (VPS). Plowing through the OpenVZ documentation can be a bit intimidating, so let’s walk through the easy way of getting started with OpenVZ on a Debian Etch system.
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RPMforge is a collaboration of Dag, Dries, and other packagers. They provide over 4000 packages for CentOS, including mplayer, xmms-mp3, and other popular media tools. It is not part of RedHat or CentOS but is designed to work with these major distributions.
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We have made a small and dirty bash script which installs and configures OpenVPN on CentOS 5 32bit. The VPN server’s primary (and only) use is for safe browsing i.e. tunneling all your traffic through your VPS. The script also generates your client configuration file along with the necessary keys for authentication.

Requirements

1. CentOS 5 32bit minimal OS template

2. TUN/TAP device enabled on your VPS

3. iptables NAT support

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This tutorial will walk you through installing the LiteSpeed web-server on CentOS 5.2.

The tutorial assumes the following:

• You are working on a clean server
• You have completed the CentOS Setup Guide
• You are familiar with basic Linux commands
• You are running the commands as a normal user with ’sudo’ permissions

Update Your System

The first thing we need to do is make sure your Cloud Server has all of it’s security patches. Connect to your Cloud Server with SSH (or the Console from the Control Panel) and login as your normal user. For the purposes of this walk-through our sample user is conveniently named ‘user’.
Execute the YUM package manager and use the ‘upgrade’ command to upgrade the system:

# sudo yum upgrade

A series of items will fly by and you will be prompted to install… press Y followed by Enter. This will take a few minutes.

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