codex-lv2-may-2025

Unix Shell Basics – Lesson Index (Part 2)

Continue building your command-line skills with more navigation commands, path strategies, and real-world examples.

1. Moving Between Folders with cd

Learn how to change directories and go up and down folder levels using cd.

2. Special Directories and Hidden Files

Reveal hidden files and understand the role of . and .. in navigation.

3. Moving with Relative and Absolute Paths

Use both relative and absolute paths to move around the file system from anywhere.

4. Understanding the Structure of a Shell Command

Break down shell commands into parts: commands, options, and arguments—and why spaces and case matter.

5. Nelle’s Pipeline: Organizing Files and Using Tab Completion

See a real example of organizing lab data, and use tab completion to speed up command entry.