Junaid Ali junaid-ali

AWS CLI Cheatsheet

http://docs.aws.amazon.com/IAM/latest/UserGuide/best-practices.html https://www.youtube.com/watch?v=_wiGpBQGCjU

Setup

A quick run down on iptables rules

What is it?

iptables is a cli frontend to netfilter, the Linux kernel firewall/nat implementation for OSI layer 3 and 4.

Okay, give me more details

When you run "iptables", the actual file being executed is "xtables-multi". That is, because the file name "iptables" is symlinked to "xtables-multi".

Transforming Code into Beautiful, Idiomatic Python

Notes from Raymond Hettinger's talk at pycon US 2013 video, slides.

The code examples and direct quotes are all from Raymond's talk. I've reproduced them here for my own edification and the hopes that others will find them as handy as I have!

Looping over a range of numbers

for i in [0, 1, 2, 3, 4, 5]:

Setting up a Persistent, Unified Chat Proxy & Shell Client

Overview

This guide provides a steps for setting up a unified shell chat proxy & client running in a persistent screen session. The following steps are covered:

Server operating system & packages will be updated.
Timezone will be updated.

Project Title

One Paragraph of project description goes here

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.

Prerequisites

#IRC Reference

Not intended as a guide for newbies, more like a "cheat sheet" for the somewhat experienced IRC user, especially one who wields some power over a channel.

##The Basics

/join #channel
- Joins the specified channel.
/part #channel
- Leaves the specified channel.

	set -ex

	REGISTRY_INGRESS_IP=10.73.177.23
	REGISTRY_INGRESS_REGISTRY_INGRESS_HOSTNAME=registry.$REGISTRY_INGRESS_IP.xip.io

	# if [ ! -e $REGISTRY_INGRESS_HOSTNAME.key ]; then
	# echo '{"CN":"'$REGISTRY_INGRESS_HOSTNAME'","hosts":[""],"key":{"algo":"rsa","size":2048}}' \| cfssl gencert -config=ca-config.json -ca=ca.pem -ca-key=ca-key.pem -hostname="$REGISTRY_INGRESS_HOSTNAME" - \| cfssljson -bare $REGISTRY_INGRESS_HOSTNAME
	# fi

	# juju ssh easyrsa/0

	# Add this snippet to the top of your playbook.
	# It will install python2 if missing (but checks first so no expensive repeated apt updates)
	# [email protected]

	- hosts: all
	gather_facts: False

	tasks:
	- name: install python 2
	raw: test -e /usr/bin/python \|\| (apt -y update && apt install -y python-minimal)

	#!/bin/bash
	#####################################################
	# Name: Bash CheatSheet for Mac OSX
	#
	# A little overlook of the Bash basics
	#
	# Usage:
	#
	# Author: J. Le Coupanec
	# Date: 2014/11/04