DHCP is widely used to assign IP addresses to computers on a network. Most home Internet connections are assigned IPs via DHCP by the Internet Service Provider (ISP). If you are using Linux as your Operating System and want to force a renew of your DHCP lease/DHCP assigned IP address you can do so via the Linux command line.
Webmin is a free and open source web-based control panel for managing a dedicated or virtual private server. Webmin works well for server administrators with intermediate as well as advanced level knowledge.
In this post I look at how to install Webmin on Centos Linux.
vnStat is a very simple utility that can track the amount of bandwidth used by your web server. It works by monitoring the received and transmitted bytes counters of your network interface and logging the data in a database. In this post I look at how to install vnStat and a web-based front end on a CentOS Linux web server.
PHP is by far the most popular scripting language for dynamic web pages but it is not the most efficient language. Each time a PHP page is accessed it has to be:
If the same script is accessed 100 times these steps are repeated a 100 times. To avoid this repetition and waste of server resources you can use the Alternative PHP Cache or APC.
APC is a PECL extension that caches frequently accessed PHP files code in opcode format for faster execution thereby reducing CPU load on your web server. In this guide I write about how to install and configure APC.
I have a centos 4.5 powered VPS that was running out of memory at peak times and so I decided to take a look at using squid to reverse proxy apache. When squid is used as a reverse proxy all http requests are proxied through squid to apache. The advantage of this setup is: