1. 5

  2. 3

    If you have the Stylish browser add-on, you can make this book much easier to read with this custom style I wrote: The Art of Unix Programming, and … Usability – improve readability.

    Here is the main part of the style’s CSS, if you just want to use your developer tools on each page:

    body {
        font-size: 20px;
        line-height: 1.3;
        max-width: 700px;
        margin-left: auto;
        margin-right: auto;

    I referred to Butterick’s Practical Typography when choosing these numbers.