This is absolutely linux command structure and howto command Help, read as well as making some sense from the Command help.

• Linux user types (root vs regular)
• The 3-part command structure (command, option, argument)
• Rules (case sensitive, lowercase, spacing)
• How to read --help output ([], ... symbols)
• 5 worked examples with breakdowns (ls, mkdir, pwd, head, tail)
• Basic commands reference table
• 6 practice questions with full answer key