Stefan Kuntz Stefan-Code

The fastest remote directory rsync over ssh archival I can muster (40MB/s over 1gb NICs)

This creates an archive that does the following:

rsync (Everyone seems to like -z, but it is much slower for me)

a: archive mode - rescursive, preserves owner, preserves permissions, preserves modification times, preserves group, copies symlinks as symlinks, preserves device files.
H: preserves hard-links
A: preserves ACLs

How to: Allow Node to bind to port 80 without sudo

TL;DR

Only do this if you understand the consequences: all node programs will be able to bind on ports < 1024

sudo setcap 'cap_net_bind_service=+ep' /usr/local/bin/node

Important: your node location may vary. Use which node to find it, or use it directly in the command:

Controlling the Brother P-Touch Cube label maker from a computer

The Brother PTP300BT label maker is intended to be controlled using the official Brother P-Touch Design & Print iOS/Android app. The app has arbitrary limits on what you can print (1 text object and up to 3 preset icons), so I thought it would be a fun challenge to reverse engineer the protocol to print whatever I wanted.

Python code at the bottom if you want to skip the fine details.

Process

Intitially I had a quick peek at the Android APK to see if there was any useful information inside. The code that handles the communication with the printer in Print&Design turned out to be a native library, but the app clearly prepares a bitmap image and passes it to this native library for printing. Bitmaps are definitely something we can work with.

	#!/usr/bin/env python

	import argparse
	import copy
	import math
	import pickle
	import random
	from itertools import combinations

	/* Skip Lists: A Probabilistic Alternative to Balanced Trees */

	#include <stdlib.h>
	#include <stdio.h>
	#include <limits.h>

	#define SKIPLIST_MAX_LEVEL 6

	typedef struct snode {
	int key;

	#!/bin/sh
	#
	# Put this file in /usr/local/etc/rc.d/btsync.sh

	case "$1" in

	stop)
	echo "Stop BitTorrent Sync..."
	kill "`cat /volume1/homes/btsync/bin/.sync/sync.pid`"
	kill "`cat /volume1/homes/btsync/bin/.sync/sync.pid`"

	#!/bin/sh

	if [ ! "$1" ]
	then
	echo "Usage: ocr <image-file>"
	exit
	fi

	if [ "x$1" = "x-h" ]
	then

	# put in shebang here
	from __future__ import print_function, division

	"""
	Take all duplicate files from decending directories and move
	them into a new folder "Duplicates" in the working directory.
	"""

	import os
	import sys