Implementing Nginx PageSpeed module's Shard domains with Drupal site

The web browsers by default limits number of concurrent connections for each host. When that limit exceeds, the resources (like CSS, images, etc.) will remain in queue waiting to be downloaded until the prior downloads are completed. This results slow page load times user experience. One solution to reduce page load time is by domain sharding. This technique splits the resources download across multiple sub-domains (eg., resulting an increase in simultaneous connections.

How to save/remove existing Vagrant box and restore the saved vagrant box

We know that Vagrant is a tool for building complete development environments. It allows us to imitate the setup of a server on our local machine which can be easily reproduced on any system.

This article will show three useful routines for Vagrant: saving an existing Vagrant box setup, removing old/unused Vagrant box and restoring saved vagrant box. It is assumed that you are using Windows as host machine's OS and Cygwin command line interface. Throughout this article, we will be using centos7drupal name for our Vagrant box.

Setup alternative Twitter Bootstrap based Munin template

The Munin's generated web pages are very old fashioned and dull. Its design uses tables with small text and too much spaces. This guide will show how to change the Munin's template and should be continuation of Setup Munin on CentOS 7 with nginx. There will be two alternative Munin 2.x templates will be shown here:

1. Munin Dynamic Template

This alternative template uses jQuery and Twitter Bootstrap for Munin 1.x and 2.x versions that enhanced user experience and improve web pages' appearance. The following are the steps to setup this template:

Installing Monit to monitor your server running CentOS 7 with nginx

Monit can manage and monitor processes, programs, files, directories and filesystems of your UNIX server for you. You can program Monit to execute action for events like: service stops running or its using too much CPU or a host is unreachable. The following steps are tested running on my Linode server running Centos 7 64-bit. It is assumed that nginx is already installed in your system. If not, please follow this guide.