Archive for April, 2013


Using the Magic SysRq Key to Rescue a Linux System

It could be a freeze, a crash, or simply completely or near unresponsiveness that drives you to shut off your server and start it back up cold. That, however, is never ideal. The ideal way to recover a system is to bring it back to complete functionality or simply restart it gracefully. Enter Magic SysRq, […]

Even More Apache Performance Tips

We are not quite done yet. Here are four more tips for boosting performance on Apache web servers.
1. Use mod_deflate/gzip – Gzip compression makes smaller file sizes for the content you send to client browsers. The browsers then uncompress and display through a seamless deflating process. The result is better server performance and faster […]

4 Apache Performance Tips

Previously, we revealed some helpful security tips for Apache web servers. Today, we are back with more tips to help boost your Apache performance.
1. Prefer mod_disk_cache over mod_mem_cache – Having a caching module is definitely a good idea for Apache, but you should use mod_disk_cache rather than mod_mem_cache. The latter […]

3 More Differences Between Linux and BSD

In the first post on this topic, we looked at 3 key differences between Linux and BSD: the licensing, the kernel, and the package management system. The following are three more differences you should probably know.
1. Hardware support – In many cases Linux supports hardware sooner and more often than BSD. This is partly […]

3 Differences Between Linux and BSD

Linux and BSD are two of the most highly regarded server operating systems in the world, mainly for their security, flexibility, and open source development. In reality, both terms broadly refer to multiple operating systems, and it is not possible to compare the two without confusing some of their variants. There are, however, general similarities […]

Stress Test Your Web Server

It is inevitable that high traffic websites will cause a server stress. CPU and memory loads will rise, and it could affect performance. If you are not careful, it could even bring your server and all of its websites to a halt. Therefore, it is imperative that you have at least a general idea of […]

Common PHP Security Risks

PHP is a server-side scripting language that is among the most popular choices for web applications. Web administrators love it, and some of the world’s top websites rely on it. Because it uses server-side scripting, however, there are inherent risks involved with using it. By knowing those risks and how to deal with them, you […]

Linux Server Network Troubleshooting Tools

When you have problems with your server, one of the first things you might want to check is your networking. Slow transfer speeds or incomplete delivery might be signs of network problems. The following are some network troubleshooting tools for Linux servers.
Nmap – Great for network auditing, Nmap offers port scanning, ping […]

How to Install OpenVZ on CentOS

CentOS is one of the most popular free and open source server operating systems. OpenVZ is a popular open source system for creating virtual private servers. Combine the two together, and you have a low-cost yet powerful VPS system. The following is a brief installation guide to get OpenVZ running on CentOS.
Step 1. Add […]

The Energy Saving Benefits of Virtualization

When businesses talk about virtualization, they are often concerned with the financial savings that it can bring. When IT people talk about it, they usually laud its ability to do more with less space, fewer servers, and often less effort. In addition to those technical and financial savings, virtualization can also help conserve energy in […]