Command line
============

Objectives
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- Be able to open the command line on their computer;
- Be familiar with directory and file structure through the command line.
- Be able to manipulate files and directories through the command line.

Plan
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1. Demonstrate opening the command line. Explain that this might be different on
   everyone's machine.
2. Identify current directory and open it in a GUI to see that you're seeing the
   same things. Possibly, draw file structure on the board.
3. Demonstrate listing contents (also compare to GUI).
4. Create the `rsd-directory`. (also compare to GUI)
5. Move in to directories and specifically explain `..` (also compare to GUI).
6. Copy files.
7. Move/rename (explain that these are essentially the same thing)
8. Delete files.
9. Manipulate directories: discuss recursive flag.
10. Demonstrate tab completion and using history with up/down arrows.

FAQ
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1. Why does your terminal look different to mine?
2. What does `/s` stand for in `rmdir /s`? **Answer** It stands for "sub
   directories".
3. What does `-r` stand for in `rm -r` and `cp -r`? **Answer** It stands for
   "recursive".