Nginx (pronounced “Engine-X”) is an open source Web server and a reverse proxy server with a strong focus on high concurrency, performance and low memory usage. It can deploy dynamic HTTP content on a network using FastCGI, SCGI handlers for scripts, uWSGI application servers or Phusion Passenger module, and can serve as a software load balancer.
I don’t use Nginx currently on any of my own web servers, but I do manage a customers images server which uses Nginx.
I’m currently managing an images server for a customer that uses Nginx on an old Debian 5 install. At some point they installed a version of Nginx from source, and I wanted to be able to install an updated version from source using the same command line arguments for the configure command.