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Students will be able to navigate their system’s file structure using the command line in terminal.

• CLI - Understand and explain what terminal is and why we use it.
• CLI - Navigate through directories using relative and absolute paths*
• CLI - use the cd command to move up and down directories
• CLI - Use the ls keyword to list items in a directory
• CLI - Remove a file and a directory by using ‘rm’ and rm -rf keywords
• CLI - move files and directories using the mv command

Back in the day (the 1980s!), computers only had a terminal to control them. Later on, GUIs were created to make computers more accessible (like for your computer-illiterate grandparents). Developers continue to use the terminal instead of the GUI because it makes you faster and more in control.

Any students that have done this lesson before should do the advanced CLI Bash Scripting Lab

You're going to learn about the command line by planning for a trip.

• Open your terminal. You’ll see a tilde: ~. This means you’re in your user's home directory.
• Enter pwd. Explain pwd means print working directory.
• Let’s change directories. First check what directories are within the directory where you are standing by using ls.
• Show students how to change directories by using the cd <directory-name> command. Change to desktop directory.
• Students mkdir development.
• Show students how to make a new directory in development called trip. Check and see that the directory was made by using ls.
• Show students how to...
  • create directories for countries within the trip directory.
  • create directories for cities within the countries.
  • create text files for landmarks you want to visit in the cities directories by using touch.
  • use subl <file_name> to open in sublime and add information about the landmarks.
  • remove a file that they longer want using rm.
  • remove an entire directory using rm -rf.
• Accidentally place a file in the wrong directory, then show students how to move it with mv.
• Students practice moving up the tree using cd ...
• Important: directories only know what’s directly inside of them.
• Show students how to write out the relative path to the cities from the trip directory.
• Show students how to write out the absolute path to different files and directories.
• Interactive Practice - have students...
  • use cd .. to move to the trip directory.
  • create one new country directory.
  • create two new city directories inside the new country directory.
  • create 3 things to see or do in each city.
  • on your whiteboard, draw out the tree for each directory and file inside the trip directory.

• As we learn to build complicated applications, being able to swiftly navigate your computer using the command line will make your life much easier. The command line will be important not just for navigation, but you'll also use it to do things like boot the local server for your web apps, write scripts to automate tasks, and execute other important functions on your computer.

• Navigating your computer from the command line is a lot about muscle memory. It's important that students get a lot of repetition in with these commands.
• In Lab: Find The Missing Pets, instructor should complete one or two examples before releasing students.
• In General for Day 1:
  • Split class into MacBook and Chromebook for environment set up.
  • Demo the code when demoing final projects from previous students. Soundbite could be something like: this looks like Greek, but at the end of this course you will be able to read it AND write it!
  • Talk to about website versus web application (use a concrete example like Yelp). Web applications rely on a back-end written in a programming language like Ruby to interact with users and show customized content.

• It might be fun for the class to play around with these CLI easter eggs.

View Unit 1: Command Line on Learn.co and start learning to code for free.