This command will literally overwrite the file that you do whenever you try to edit it. You need two >> to append at the end of a file, but it’s super-duper hard to put text in the middle of a file from the terminal. That is why people use editors, for sure. Now that I think about it, there probably is some psychopath who uses the actual command line as an editor. They’re probably more elitist than Vim users lol.