Markus Juenemann mjuenema

AES encryption with PKCS5 padding

NOTE: Possible use the Cryptography package instead.

Install Python pycrypto_ package.

Use Molecule and Docker to test Ansible roles

Install pre-requisites.

$ which yum && sudo yum install libffi-devel python-devel python-virtualenvwrapper
$ which apt-get && sudo apt-get libffi-dev python-dev python-virtualenvwrapper

Install Docker.

$ TODO

OpenSSL Commands

Displaying Server Certificates

$ echo | openssl s_client -connect www.example.com:https 2>/dev/null | openssl x509 -noout -text

$ echo | openssl s_client -connect www.example.com:https 2>/dev/null | openssl x509 -noout -dates
notBefore=Aug  4 00:00:00 2016 GMT
notAfter=Sep 19 23:59:59 2017 GMT

Vagrant Notes

Installing and customising Vagrant

Install Vagrant from the download page to ensure the most recent version is installed.

BFG Git repo cleaner

The BFG Git repo cleaner is a simpler, faster alternative to git-filter-branch for cleansing bad data out of your Git repository history, e.g.

Removing Crazy Big Files
Removing Passwords, Credentials & other Private data

Create a backup of your current working copy of the repository.

Git Flow Quick Reference

Init

$ git flow init -d

Feature

Git Crypt

$ git-crypt init
$ vim .gitattributes
secretfile filter=git-crypt diff=git-crypt
*.key      filter=git-crypt diff=git-crypt

Capture and test sys.stdout with nosetest

import sys
import tempfile

import sys
import tempfile

class Base(object):

Python decorator example

def typecheck(type_):
    def decorator_(func):
    
        def wrapper_(name):
           if not type(name) == type_:
               raise TypeError
 else:

	"""
	Ping all hosts in 10.1.10/24 and print IP addresses of
	hosts that replied.

	Requires scapy (https://pypi.python.org/pypi/scapy) and
	must be run with root permissions.

	(c) 2017 Markus Juenemann

	"""