This guide provide step-by-step on how to install StartSSL certificate to Webmin so that we can access to the Wemin Control Panel with a signed https address. First, if the private key is created by StartSSL and password-protected, we should decrypt it:[bash]openssl rsa -in server.name-ssl.key -out server.name-ssl.key[/bash] Combined private keys and certificates to have webmin-compatible…
PageSpeed speeds up your site and reduces page load time. This open-source webserver module automatically applies web performance best practices to pages and associated assets (CSS, JavaScript, images) without requiring that you modify your existing content or workflow. This tutorial help install mod_pagespeed for Apache on CentOS server. Install mod_pagespeed For 64-bit OS: [bash]wget https://dl-ssl.google.com/dl/linux/direct/mod-pagespeed-stable_current_x86_64.rpm[/bash] For 32-bit OS:[bash]wget https://dl-ssl.google.com/dl/linux/direct/mod-pagespeed-stable_current_i386.rpm[/bash]…
A great news for the PHP community is that Zend Optimizer+ was became open-source, so it is built-in from PHP 5.5. This tutorial will guide how to install Zend Opcache in PHP 5.5 and will mention a little bit about its performance. What is Optimizer+? According to PHP OptimizerPlus RFC, Optimizer+ is the fastest opcode cache…
Kingsoft Office is an office suite developed by Zhuhai based Chinese software developer Kingsoft. This offers most of the features and functionality like Microsoft Office. This tutorial guides how to install KingSoft Office for Fedora users. KingSoft Office includes the following components: Kingsoft Writer, Kingsoft Presentation and Kingsoft Spreadsheet. Kingsoft Office personal version is completely free. With…
There are various ways to use a proxy such as scraping other websites’ data, accessing google and Facebook, accessing to a website which is only limited to users in a specific country. Although we can use some public, free proxy such as HideMyAss, it is more convenient to have a private proxy which is dedicated…
When working on high-traffic website or even medium-traffic site on a low-end VPS, we will need to find a way to serve traffic effectively. Using Vanish to cache the page content is a good idea to reduce the server load. This tutorial discuss about how to setup varnish with virtualmin on CentOS. I have just…
This short tutorial mentions some Linux performance testing commands to measure server/VPS performance. This will be added gradually as soon as I have more tools to test 🙂 1. Test disk IO: [bash]$ dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync 16384+0 records in 16384+0 records out 1073741824 bytes (1.1 GB) copied, 15.1643 s, 70.8 MB/s[/bash] 2. Test disk…
In XenServer versions 6.x, the direct GUI ability to auto-start a Virtual Machine on the startup of XenServer was removed. This tutorial guide on How to Setup Auto-Start Virtual Machines in XenServer 6.x. Setting the XenServer to allow Auto-Start Gather the UUID’s of the pools you wish to auto-start. To get the list of the pool’s…
When running out of current assigned IP ranges, you will need to add a new IP range to Citrix XenServer before can assigning it to specific VMs. This tutorial contains step-by-step guide on this work. The following work will be done in the main server which hosts Citrix XenServer. When requesting additional IPs you should specifically…
In most recent mysql-based applications today, InnoDB is used as the database engine due to its great supported features such as transaction, foreign key, etc. But if the DB server is not configured properly, it might cause significant impact on the application performance. This quick article summarize some suggested tweaks for MySQL InnoDB performance. The most…