.vimrc file The file .vimrc in your home directory has instructions for [[vim]] to load every time it runs. Customizations go there. For instance, you might want to use [[Markdown]] to edit files that end in .md. The system default for some reason is to treat these as [[Modula-2]] files, though we don’t have a Modula-2 compiler running (yet). So the contents of .vimrc should read au BufRead,BufNewFile *.md set filetype=markdown For more suggestions in deep depth on how to set up your .vimrc please read this tutorial from Doug Black[1]. (The website’s no longer up, it’s on the ’net archive. [1] https://web.archive.org/web/20161224112739/https://dougblack.io/words/a-good-vimrc.html