adding week 4 aliases for days (#13)

Author: elreydetoda

weekly_lessons/04-aliases/README.md

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+# Week 04 ( aliases for days )
+
+- [Week 04 ( aliases for days )](#week-04--aliases-for-days-)
+  - [Pre-reqs](#pre-reqs)
+  - [Why](#why)
+  - [Examples](#examples)
+  - [Resources](#resources)
+
+## Pre-reqs
+
+- bash setup
+  - [video](https://youtu.be/mfP8R1yr80A)
+  - [writen instruction](/install_methods/)
+
+## Why
+
+1. make life easier 😁
+2. nested aliases are bae 🙃 (automate your automation)
+3. possible attack
+4. how to thwart :arrow_up:
+
+## Examples
+
+```bash
+help help
+help -d *alias*
+exit
+help alias
+alias -p
+pe-bash
+ls --help | less
+ls --help |& less
+ls -a
+ls -A
+la
+alias la='ls -A'
+la
+alias -p
+unalias la
+alias -p
+alias ls='rm -rf /'
+ls
+exit
+pe-bash
+ls
+ls -a bash_tricks
+rm -rf !$
+exit
+vagrant provision && vagrant ssh
+pe-bash
+pe-cleanup
+pe-bash
+help unalias
+alias -p
+alias ls='rm -rf /'
+alias -p
+\unalias -a
+alias -p
+```
+
+## Resources
+
+- [my vagrant aliases (nesting)](https://github.com/elreydetoda/all-linux-tings)* (work in progress)
+- [github dotfiles](https://github.com/search?q=dotfiles)