07 stdin (#17)

* adding stdin lesson

* adding week 06 video

weekly_lessons/06-runtime_short/README.md

@@ -5,6 +5,7 @@
   - [Why](#why)
   - [Examples](#examples)
   - [Resources](#resources)
+  - [Video](#video)
 
 ## Pre-reqs
 
@@ -49,3 +50,7 @@ Ctrl+C # kill nmap scan
 - [(FreeBSD) The Power Of CTRL+T](https://blog.danielisz.org/2018/06/21/the-power-of-ctrlt/)
 - tool(s) used during recording:
   - [nmap](https://nmap.org/)
+
+## Video
+
+[![video pic](https://img.youtube.com/vi/Enq3qT9fCWA/0.jpg)](https://youtu.be/Enq3qT9fCWA)

weekly_lessons/07-stdin/README.md

@@ -0,0 +1,103 @@
+# Week 07 ( stdin )
+
+- [Week 07 ( stdin )](#week-07--stdin-)
+  - [Pre-reqs](#pre-reqs)
+  - [Why](#why)
+  - [Examples](#examples)
+  - [Resources](#resources)
+
+## Pre-reqs
+
+- bash setup
+  - [video](https://youtu.be/mfP8R1yr80A)
+  - [writen instruction](/install_methods/)
+- programs (optional, but recommended)
+  - nmap
+
+## Why
+
+1. Level up your bash scripting
+2. Really cool to see what is possible
+3. Very helpful and useful for daily activities
+
+## Examples
+
+```bash
+git clone https://github.com/lanmaster53/recon-ng && cd ${_##*/}
+sed -i.orig 's/build-deps/& \&\& apk add --no-cache bash/' Dockerfile
+# if you need to do it again run below command
+#   cp Dockerfile.orig Dockerfile && sed -i.orig 's/build-deps/& \&\& apk add bash/' $_
+docker build --rm -t recon-ng:latest .
+# definitely something you don't want to do in production!!! ( -v flag )
+#   https://blog.secureideas.com/2018/08/escaping-the-whale-things-you-probably-shouldnt-do-with-docker-part-2.html
+#   specifically: https://github.com/ProfessionallyEvil/Pequod/blob/master/pres.md#bind-mounts
+docker run --rm -it -v $(pwd):/recon-ng recon-ng bash
+./recon-ng
+exit
+./recon-ng -r <(printf 'marketplace install all\nexit\n')
+
+# file descriptors 0, 1, 2, 3, etc...
+
+pe-bash
+
+### difference between < << & <<<
+## <
+# read in from file
+## <<
+# is for the heredoc structure
+## <<<
+# read in from string
+tr ' ' '\n' <<< "hello there"
+
+# https://blog.elreydetoda.site/curl-bad/
+#   command I tell them to run: curl -fsSL 'https://git.io/Jvpvi' | bash -xs '24' '192.168.22.0' '10.0.0.1'
+curl -fsSL 'https://git.io/Jvpvi' | bash -s '24' '192.168.22.0' '10.0.0.1'
+
+exit # get out of bash container
+sort -u << 'EOF'
+bison
+cmake
+cmake
+cmake
+gcc
+gcc
+gcc-mingw-w64
+glib-2.0
+gnutls
+EOF
+
+sort -u << 'EOF' | tr '\n' ' '
+bison
+cmake
+cmake
+cmake
+gcc
+gcc
+gcc-mingw-w64
+glib-2.0
+gnutls
+EOF
+
+# https://blog.elreydetoda.site/cool-shell-tricks/#bashscriptinggrepheredocwipaddresses
+grep -oP '\d+\.\d+\.\d+\.\d+(\/\d+|)' << 'EOF'
+8.8.8.8-google's ip
+1.1.1.1/8: cloudflare's ip
+9.9.9.9 - quad-9's IP
+EOF
+
+mapfile -t array < <(printf 'hello\nthere\n')
+echo "${array[0]}"
+echo "${array[1]}"
+```
+
+## Resources
+
+- [difference between << and <<<](https://askubuntu.com/questions/678915/whats-the-difference-between-and-in-bash#answer-678919)
+- [https://explainshell.com/explain?cmd=curl+-fsSL+%27https%3A%2F%2Fgit.io%2FJvpvi%27+%7C+bash+-s+%2724%27+%27192.168.22.0%27+%2710.0.0.1%27](https://explainshell.com/explain?cmd=curl+-fsSL+%27https%3A%2F%2Fgit.io%2FJvpvi%27+%7C+bash+-s+%2724%27+%27192.168.22.0%27+%2710.0.0.1%27)
+- references in code:
+  - [https://blog.secureideas.com/2018/08/escaping-the-whale-things-you-probably-shouldnt-do-with-docker-part-2.html](https://blog.secureideas.com/2018/08/escaping-the-whale-things-you-probably-shouldnt-do-with-docker-part-2.html)
+    - specifically: [https://github.com/ProfessionallyEvil/Pequod/blob/master/pres.md#bind-mounts](https://github.com/ProfessionallyEvil/Pequod/blob/master/pres.md#bind-mounts)
+  - [https://blog.elreydetoda.site/curl-bad/](https://blog.elreydetoda.site/curl-bad/)
+  - [https://blog.elreydetoda.site/cool-shell-tricks/#bashscriptinggrepheredocwipaddresses](https://blog.elreydetoda.site/cool-shell-tricks/#bashscriptinggrepheredocwipaddresses)
+- tool(s) used during recording:
+  - [recon-ng](https://github.com/lanmaster53/recon-ng)