Nginx HTTP Authentication

# package for generating .htpasswd file
sudo apt-get install apache2-utils

# create .htpasswd file
sudo htpasswd -c /etc/nginx/.htpasswd username (this will prompt you for password)

# add following 2 line in nginx config (/etc/nginx/sites-available/test.com)
auth_basic    "Restricted";
auth_basic_user_file    /etc/nginx/.htpasswd;

# sample config file
server {
	server_name    test.com www.test.com;
	root    /opt/test;
	index    index.html;
	auth_basic    "Restricted";
	auth_basic_user_file    /etc/nginx/.htpasswd;
}