How Do You Set up Nginx to Be a Reverse Proxy That Conveys Inbound Connections to the Web Server with the Fewest Active Connections?

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Problem scenario
You want your website to perform well.  By default Nginx’s load balancing system uses the round-robin technique.  You want available yet under-utilized web servers to handle inbound connection requests (aka someone using a web browser to go to a web page).  Individual users can put a disparate load on a given Nginx instance.  Some website users will spend a significant amount of time on a web page.  Others will invoke various application features that will require more resources than others. 

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How Do You Install Nginx on a CentOS/RHEL/Fedora Server?

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Problem scenario
You want to install Nginx on a CentOS/RHEL/Fedora Linux server.  What do you do?

Solution
1.  Create a file here: /etc/yum.repos.d/nginx.repo

2.  It should have these five non-blank lines:

[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/mainline/centos/7/$basearch/
gpgcheck=0
enabled=1

3.  Run these commands:

sudo yum -y update
sudo yum -y install nginx
sudo systemctl start nginx

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