Notes for Computer Information Technology 160
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nov11.md 815B

November 11

Overview

Contents of an Email (excluding “envelope”)

  • Header
    • FROM
    • TO
    • DATE
  • Separator
  • Body

History

You can press up on the terminal to type the previous command

!! runs the previous command in bash

history is stored in .bash_history

Injection

Sometimes when user input is taken, it is executed as code.

Base64

$ echo "steve" | base64
c3RldmUK

$ echo '$' | base64
JAo=

base64 maps character sets and is used to remove special characters from the password