Alex Atkinson AlexAtkinson

Ansible Cheat Sheet

Stuff I forgot...

TODO: Remember the stuff that drove me nuts as a noob...

Personal Use Tactics

These tactics shouldn't be employed in production.

Redirects

Redirect operations are quite involved. Here are a few of the highlights:

The files: '/dev/std{in,out,err}', are symlinks to file descriptors.
File descriptors (aka file handles) are numbers that identify open files.
A file is an object that stores data, information, settings, or commands.
The numbers commonly seen in the redirect '2>&1' are file descriptors.
Running 'file /dev/std*' outputs: /dev/stdin: symbolic link to /proc/self/fd/0 /dev/stdout: symbolic link to /proc/self/fd/1

PC Setup

Codified PC Setup.

Usage

source <(curl -s https://gist.githubusercontent.com/AlexAtkinson/27b12f4dfda31b1b74fcab3fc9a6d192/raw/init.sh)

Emojis

Name	Image
aircall-available
aircall-connected
aircall-incoming

REGEX

Reference

Character Sets/Ranges   []                  : Match any characters within. Required expression.
Qualifiers              {}                  : Quantity or range of an expression. IE: {3}, {2,200}
Groups                  ()                  : Group expressions. Subgroups supported.
Non-Capturing Group     (?:foo)             : Does not "remember" matches. Lower overhead.
Kleen Star              *                   : May occur 0 or more times.

On Acceptance Criteria

🗒️ An excerpt from my good, ol' Jira Team Runbook.

Acceptance Criteria tactices are ever evolving, but this is a good skeleton to start from.

User story
Functional requirements
Link to design docs / supporting resources
Technical breakdown and analysis to identify infrastructure dependencies

	#!/usr/bin/env bash
	# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	# PW Material Generator
	# Notes:
	# - Used by genpass
	# - Generates 20 characters per invocation
	# - Takes ~1ms per character generated on an average
	# system
	# - Will _always_ lead with an ALPHA character
	# - Will _always_ include _at least one SPECIAL character

	#!/usr/bin/env bash
	# Truecolor demo
	# Thanks to those who I've taken inspiration from.
	# My Adds:
	# - int bounding
	# - text overlay for single-line output with contextual hint

	__color_truecolor_demo() {
	local TXT FG COLUMN COLUMNS FILL_L FILL_R R G B
	TXT="This will be a smooth gradient if truecolor is supported."

	#!/usr/bin/env bash
	# shellcheck disable=2183

	# GIST NOTES
	# v1 is here: https://gist.github.com/AlexAtkinson/49078eb9a2dcff17b28371eb92964cca

	# Clean Test - run:
	# NOTE: The hash in the URL below should match this gist. <<< VERIFY THIS
	# docker run -e LANG="C.UTF-8" -e LC_ALL="C.UTF-8" -it debian /bin/bash
	# apt update && apt -y install curl

	#!/usr/bin/env python
	# Copy into /usr/local/bin or as appropriate for your $PATH

	import argparse
	from pypdf import PdfReader
	from pypdf.errors import PdfReadError

	parser = argparse.ArgumentParser()

	parser.add_argument("pdf", help="The PDF to extract attachments from.", type=str)