Alexander Wang dragonman225

Raspberry Pi Zero OTG Mode

Simple guide for setting up OTG modes on the Raspberry Pi Zero - By Andrew Mulholland (gbaman).

The Raspberry Pi Zero (and model A and A+) support USB On The Go, given the processor is connected directly to the USB port, unlike on the B, B+ or Pi 2 B, which goes via a USB hub.
Because of this, if setup to, the Pi can act as a USB slave instead, providing virtual serial (a terminal), virtual ethernet, virtual mass storage device (pendrive) or even other virtual devices like HID, MIDI, or act as a virtual webcam!
It is important to note that, although the model A and A+ can support being a USB slave, they are missing the ID pin (is tied to ground internally) so are unable to dynamically switch between USB master/slave mode. As such, they default to USB master mode. There is no easy way to change this right now.
It is also important to note, that a USB to UART serial adapter is not needed for any of these guides, as may be documented elsewhere across the int

Disabling GNOME Tracker and Other Info

GNOME's tracker is a CPU and privacy hog. There's a pretty good case as to why it's neither useful nor necessary here: http://lduros.net/posts/tracker-sucks-thanks-tracker/

After discovering it chowing 2 cores, I decided to go about disabling it.

Directories

How to add a collapsible section in markdown

1. Example

Click me

Heading

Foo
Bar
- Baz

Qux

Express & Postgres via Knex

Note: <example> is meant to denote text replaced by you (including brackets).

Setup

// global dependencies
npm install -g knex

	#!/bin/sh

	playerurl=http://radiko.jp/apps/js/flash/myplayer-release.swf
	cookiefile=./cookie.txt
	playerfile=./player.swf
	keyfile=./authkey.png

	if [ $# -eq 1 ]; then
	channel=$1
	output=./$1.flv

	#!/bin/bash

	LANG=ja_JP.utf8

	pid=$$
	date=`date '+%Y-%m-%d-%H_%M'`

	outdir="."

	if [ $# -le 1 ]; then

	# download
	aria2c -x 5 -i file.m3u8

	# decode (example)
	openssl aes-128-cbc -d -K 15D0F46608409DA364E3F5D92BDE9F61 -iv 00000000000000000000000000000000 -nosalt -in G00000000.ts -out G00000000.d.ts

	# join all ts files
	cat *.ts > out.ts

	# convert ts output file

	# this original one uses values returned from 'brew info'
	brew list --formula \| xargs -n1 -P8 -I {} \
	sh -c "brew info {} \| egrep '[0-9]* files, ' \| sed 's/^.[0-9] files, \(.\)).$/{} \1/'" \| \
	sort -h -r -k2 - \| column -t

	# faster alternative using 'du'
	du -sch $(brew --cellar)// \| sed "s\|$(brew --cellar)/\([^/]\)/.\|\1\|" \| sort -k1h

	function fieldSorterOptimized(fields) {
	var dir = [], i, l = fields.length;
	fields = fields.map(function(o, i) {
	if (o[0] === "-") {
	dir[i] = -1;
	o = o.substring(1);
	} else {
	dir[i] = 1;
	}
	return o;

	# to generate your dhparam.pem file, run in the terminal
	openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048