``` In the beginning of the Authors' creating of the book, the book was shapeless and formless, and the Authors thoughts were hovering over the face of the paper. The Authors said "L", and there was an L. The Authors said "d", and there was a d, because they meant to press "e", and the letters are right next to each other. So the Authors said "backspace", and continued where they left off, saying "et there be a space, and and let it separate the code above from the code below." The Authors called the code above "kernel space," and the code below "user space." And the Authors said "Let the space below have one root and many branches, each branch containing leaves of its own kind." And they called the branches directories, and the leaves files, and the directories were also files. And the Authors populated bin with its inhabitants. The cat, fish, python, and the gnu bison which some call yacc. The Authors said "Let there be 0," and there was 0. And they said `echo $?` to check the output, and they saw that it was good. The Authors said "Let there be 1," and there was 1. And they saw that this one was good too. The Authors called 0 "root" and 1 "user". And the Authors decided that was enough work for one week. And they passed control to userspace. ``` goto: [[0]]