08 - time (#18)

* initial week 08 push

* changing to time instead of stdin

* adding nmap

* adding url to nmap runtime commands

weekly_lessons/08-time/README.md

@@ -0,0 +1,48 @@
+# Week 08 ( time )
+
+- [Week 08 ( time )](#week-08--time-)
+  - [Pre-reqs](#pre-reqs)
+  - [Why](#why)
+  - [Examples](#examples)
+  - [Resources](#resources)
+
+## Pre-reqs
+
+- bash setup
+  - video
+
+    [![video pic](https://img.youtube.com/vi/mfP8R1yr80A/0.jpg)](https://youtu.be/mfP8R1yr80A)
+
+  - [writen instruction](/install_methods/)
+- programs (optional, but recommended)
+  - nmap
+
+## Why
+
+1. Identify how long a task(s) has ran
+2. "benchmarking" command execution time
+3. Just cause 🙃
+
+## Examples
+
+```bash
+help
+help time
+which time
+type -t time
+type -a time
+time echo
+time sleep 3
+time echo hello world | tr ' ' '\n'
+time echo hello world && echo not now
+time ( echo hello world && echo not now )
+apk add nmap --no-cache
+nmap scanme.nmap.org
+time nmap scanme.nmap.org
+```
+
+## Resources
+
+- [User CPU time vs System CPU time?](https://stackoverflow.com/questions/4310039/user-cpu-time-vs-system-cpu-time)
+- Subshell warning ⬅️ placeholder
+- [nmap runtime commands](../06-runtime_short/)