Philip Roman PhilipRoman

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

README

Create a template service file at /etc/systemd/system/secure-tunnel@.service. The template parameter will correspond to the name of target host:

[Unit]
Description=Setup a secure tunnel to %I
After=network.target

radare2

load without any analysis (file header at offset 0x0): r2 -n /path/to/file

analyze all: aa
show sections: iS
list functions: afl
list imports: ii
list entrypoints: ie
seek to function: s sym.main

Setting up Pi Zero OTG - The quick way (No USB keyboard, mouse, HDMI monitor needed)

More details - http://blog.gbaman.info/?p=791

For this method, alongside your Pi Zero, MicroUSB cable and MicroSD card, only an additional computer is required, which can be running Windows (with Bonjour, iTunes or Quicktime installed), Mac OS or Linux (with Avahi Daemon installed, for example Ubuntu has it built in).
1. Flash Raspbian Jessie full or Raspbian Jessie Lite onto the SD card.
2. Once Raspbian is flashed, open up the boot partition (in Windows Explorer, Finder etc) and add to the bottom of the config.txt file dtoverlay=dwc2 on a new line, then save the file.
3. If using a recent release of Jessie (Dec 2016 onwards), then create a new file simply called ssh in the SD card as well. By default SSH i

Docker compose as a systemd unit

Create file /etc/systemd/system/docker-compose@.service. SystemD calling binaries using an absolute path. In my case is prefixed by /usr/local/bin, you should use paths specific for your environment.

[Unit]
Description=%i service with docker compose
PartOf=docker.service
After=docker.service

The right way to override any highlighting if you don't want to edit the colorscheme file directly

Generalities first

Suppose you have weird taste and you absolutely want:

your visual selection to always have a green background and black foreground,
your active statusline to always have a white background and red foreground,
your very own deep blue background.

	// Convert a struct sockaddr address to a string, IPv4 and IPv6:

	char get_ip_str(const struct sockaddr sa, char *s, size_t maxlen)
	{
	switch(sa->sa_family) {
	case AF_INET:
	inet_ntop(AF_INET, &(((struct sockaddr_in *)sa)->sin_addr),
	s, maxlen);
	break;

	#!/usr/bin/env bash
	# groff-install-ttf converts a TrueType (ttf) or OpenType (otf) font to a
	# Printer Font ASCII (pfa) font and a groff font (ditroff) and installs them to
	# groff's site-font directory.
	#
	# Requires fontforge.
	#
	# You're the best, Peter Schaffter, but contrary to the verbose and
	# difficult-to-follow http://www.schaffter.ca/mom/momdoc/appendices.html#fonts,
	# the t42 file doesn't seem to be necessary, at least with recent versions of

	// This will open up a prompt for text to send to a console session on digital ocean
	// Useful for long passwords
	(function () {
	window.sendString = function (str) {
	f(str.split(""));
	function f(t) {
	var character = t.shift();
	var i=[];
	var code = character.charCodeAt();
	var needs_shift = character.match(/[A-Z!@#$%^&*()_+{}:\"<>?~\|]/);