The following commands can be used to quickly install nginx on a server running CentOS 6

First, install the epel repo

sudo rpm -Uvh http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm  

Install the remi repo

sudo rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-6.rpm  

Install nginx and dependencies

sudo yum install nginx  

Start the nginx HTTP server

sudo /etc/init.d/nginx start  

You should now be able to open up a browser and visit the IP address of your server and see the default nginx landing page!

Default nginx HTTP server landing page

If you want to configure nginx and change the default number of workers, use the following command to edit the nginx.conf file

sudo vi /etc/nginx/nginx.conf  

If you want to configure the virtual hosts, use the following command to edit the default.conf file

sudo vi /etc/nginx/conf.d/default.conf