Here is the video version, if you prefer it:
I think I mentioned this before when I covered the ls command, but it bears repeating:
Dot files are the files whose name begin with a dot. They are called hidden files. They can be displayed in a directory listing using ls, but only by providing the -a option. I never had to meddle with dot files in my Linux dealings so far. I did have to look at some dot files in my programming projects, but that is a different story.
Thank you for reading!