Files and the terminal

The terminal lets you control the computer by typing commands. Developers use it every day. The essentials:

pwd          # show which folder you are in
ls           # list what is in this folder (dir on Windows)
cd projects  # move into the folder "projects"
cd ..        # move up one folder
mkdir notes  # make a new folder called "notes"

A path is a file's address, for example /Users/you/projects/app.py.