What is a config file?

There are thousands of configuration files on your computer. You may never directly interact with the bulk of them, but they[he]#039[/he]re scattered throughout your /etc folder and in ~/.config and ~/.local and /usr. There are probably some in /var and possibly even in /opt. If you[he]#039[/he]ve ever opened one by accident or to make a change, you may have wondered why some configuration files look one way while others look completely different.