Complete the following steps to install NGINX Plus:
  1. Download NGINX Plus R16 repository: 
    # sudo wget -P /etc/yum.repos.d https://cs.nginx.com/static/files/nginx-plus-7.4.repo
  2. Complete the following steps to install Lua modules:
    1. Check whether the Lua version 16+0.10.13-1.el7_4.ngx is available in the list
      # sudo yum list nginx-plus-module-lua --showduplicates
    2. Install Lua module: 
      # sudo yum install nginx-plus-module-lua-16+0.10.13-1.el7_4.ngx
  3. Install NGINX Plus:
    1. Check whether NGINX Plus version nginx-plus-16-1.el7_4.ngx is available in the list
      # sudo yum list nginx-plus --showduplicates
    2. Install NGINX Plus: 
      # sudo yum install nginx-plus-16-1.el7_4.ngx