pwpearson

#!/bin/sh
head -n 4096 /dev/urandom | openssl sha1

pwpearson

# Get SHA256 of a text
# Usage:   sha256 password
# output:  5e884898da28047151d0e56f8dc6292773603d0d6aabbdd62a11ef721d1542d8
function sha256() {
  echo -n $1 | shasum -a 256
  # Source: http://albertech.blogspot.fr/2015/02/generate-sha-256-hash-from-command-line.html
}

pwpearson

#!/usr/bin/sh
# Requires OpenSCAD on $PATH

# Automatically re-exports all changed .scad files pre-commit
git diff --cached --name-only | grep ".scad$" | while read -r file; do
  basename="${file%.*}"
  echo "Exporting $file to $basename.stl..."
  openscad -o "$basename.stl" "$file"
done

pwpearson

pwpearson

Add to .bashrc or .bash_profile

function git_undelete_file () {
  if [ $# -eq 0 ]; then
        echo "Usage: git_undelete_file <filepath>";
        exit 1;
  fi

 git checkout $(git rev-list -n 1 HEAD -- "$1")^ -- "$1"

pwpearson

#!/bin/bash
# A bash script to create a time machine disk image suitable for
# backups with OS X 10.6 (Snow Leopard)
# This script probably only works for me, so try it at your own peril!
# Use, distribute, and modify as you see fit but leave this header intact.
# (R) sunkid - September 5, 2009
# 
# This will create a time machine ready disk image named with your 
# computer's name with a maximum size of 600GB and copy it to 
# /Volumes/backup. The image "file" (it's a directory, really) will 

pwpearson

Add [toc] to md file to generate table of contents

pwpearson

###Mount HFS & HFSPLUS (Apple Filesystem Types)

First thing first, you have to install kmod-hfs & kmod-hfsplus and hfsplus-tools.

Step 1: Import GPG Key

rpm --import http://elrepo.org/RPM-GPG-KEY-elrepo.org

To install ELRepo for CentOS-7:

pwpearson

1. Create new container  
   a) docker run -i -t ubuntu /bin/bash
   b) docker run --name rails_dev_container -i -t ubuntu ubuntu /bin/bash
   The command line flags - i -t provide an interactive shell in the new container

2. Show running docker containers    ==> docker ps

3. Show list of current containers   ==> 
   a) docker ps -a   (Show all containers, both stopped and running)
   b) docker ps -n x (shows the last x containers, running or stopped, ex: docker ps -n 5)

pwpearson

Months

SELECT DATEADD(MONTH, DATEDIFF(MONTH, 0, GETDATE()) - 1, 0) -- First day of previous month

SELECT DATEADD(MONTH, DATEDIFF(MONTH, 0, GETDATE()), -1) -- Last Day of previous month

SELECT DATEADD(MONTH, DATEDIFF(MONTH, 0, GETDATE()), 0) -- First day of this month

SELECT DATEADD(MONTH, DATEDIFF(MONTH, 0, GETDATE()) + 1, -1) -- Last day of this month