Here is a blog post looking into the life, death, and redirection of the legendary DEMO.txt .
In the world of computing, some names are legendary. index.html . root . sudo . But there is one file name that exists in a state of perpetual "almost-importance." It appears in every tutorial, populates every test directory, and is the victim of a thousand terminal commands every day. We’re talking about . 1. The Universal "Hello World" of Files
How to Find Out When a File Was Created in Linux - KodeKloud
Writing a blog post about "DEMO.txt" is actually a great way to talk about the unsung hero of the tech world: the placeholder. Whether you're a developer, a system admin, or just someone who’s accidentally left a file on their desktop for three months, we’ve all used it.