Image hotlinking is a situation when your image appears on other website(s) but that image was actually being served by your web server. Image hotlinking is bad; your image gets stolen from your website and your server resources is being spent to serve them. If you happen to be running Nginx as your web server, this post describes how you can use Nginx to prevent image hotlinking with a smarter way that was suggested by Hongkiat.
As a constant learner, I get to touch upon many ideas in different areas. This category is for me to capture those ideas which I felt people may reference to get ahead of their tasks. Most of the time, I do come back to this section of my blog to remember what I had learnt in the past.