In ubuntu, it is $ apache2 -v In CentOS, it is $ httpd -v To find out where apache2 or httpd program is installed you can do the $ whereis apache2 or, $ locate httpd

What is Virtual Hosting? Virtual Hosting is a technique by which web servers can serve more than one domain name on the same server. It can also be a variation of serving different sites on the same IP but on different ports. (more…)

Installing Ruby, Rails on CentOS Installing Ruby on Rails involves using yum to first install ruby and then to install ruby docs, irba followed by rails installation. $ yum install -y ruby $ yum install -y ruby-devel ruby-docs ruby-ri ruby-irb ruby-rdoc $ gem install rails --include-dependencies (more…)

Configuring server host to respond to nagios host (monitor remote services) - CentOS Download nagios plugin and nagios-nrpe plugin in the server host (client that talks with nagios host) from nagios website. The files comes as .tar files and you need to configure them for their use. Move the files to /usr/src (more…)

Apache web server referred to as simply Apache is a public-domain open source Web server developed by open community of developers. The application is designed to run on a wide variety of operating systems like Unix, FreeBSD, Linux, Mac OS X, OS/2. Visit http://www.apache.org for more details. In your terminal, issue the following command (by default, httpd is installed). This will install apache if it was not installed. (more…)

Part 2 - Making OpenVPN work as a Client When we want to connect to Office network from an external location or from home, then we need to setup our Linux box to establish communication with the server at the office via a secured link over the internet. In this part, I will list down the steps needed to establish a client communication. (more…)