Alvaro Miranda Aguilera kikitux

Keybase proof

I hereby claim:

I am kikitux on github.
I am kikitux (https://keybase.io/kikitux) on keybase.
I have a public key ASCsJyuzKsfjG0Uy2iu2YNYI36gpc4xH_fOR0q8SGl7irgo

To claim this, I am signing this object:

Internal Bash functions, useful when writing loadable builtins

Find an environment variable
Set an environment variable to a string value
Set an environment variable to a string value if it's not already set
Check if an environment variable is set
Check if an environment variable is an array
Get an environment variable that's an array
Unset an environment variable
Create an array

name of the doc

text

title	title
line1	line1

continent	country	capital
europe	italia	no_idea

Turn a Raspberry Pi into an Astrophotography Autoguider

@codefinger

I hate when my images turn out like this:

You can barely see the Crab Nebula drifting through the frame because I didn't align my mount well. To keep my telescope fixed on an object during long exposures, I needed an autoguider. But I also hate having a laptop in the field, which is required for most autoguiding solutions. To avoid this burdensome piece of equipment, I turned a Raspberry Pi with a touchscreen case into an on-board autoguiding system for my astrophotography rig.

	==> default:
	==> default: Oracle Database 11g Express Edition Configuration
	==> default: -------------------------------------------------
	..
	==> default:
	==> default: Do you want Oracle Database 11g Express Edition to be started on boot (y/n) [y]:
	==> default: Starting Oracle Net Listener...
	==> default: Done
	==> default: Configuring database...
	==> default: Done

	numnodes=2
	baseip="192.168.10"

	#global script
	$global = <<SCRIPT

	#check for private key for vm-vm comm
	[ -f /vagrant/id_rsa ] \|\| {
	ssh-keygen -t rsa -f /vagrant/id_rsa -q -N ''
	}

	#!/usr/bin/env bash
	set -e

	apt-get update
	apt-get install -y apt-transport-https ca-certificates curl software-properties-common
	curl -fsSL https://download.docker.com/linux/ubuntu/gpg \| apt-key add -
	apt-key fingerprint 0EBFCD88
	add-apt-repository \
	"deb [arch=armhf] https://download.docker.com/linux/ubuntu \
	$(lsb_release -cs) \

	0 $ tmutil listlocalsnapshots /
	0 $ sudo tmutil deletelocalsnapshots <snapshot>


	du -sk /Applications/*/ \| sort -n
	du -sk ~/.[A-z]/ ~// 2>/dev/null \| sort -un
	du -sk /Users/alvaro/Library/*/ \| sort -n

	{
	"builders": [{
	"boot_command": [
	"<tab> append initrd=initrd.img inst.text inst.ks=http://{{ .HTTPIP }}:{{ .HTTPPort }}/centos7.ks<enter><wait>"
	],
	"boot_wait": "20s",
	"guest_additions_path": "VBoxGuestAdditions.iso",
	"guest_os_type": "RedHat_64",
	"headless": false,
	"http_directory": "kickstart",

	# variables

	variable "environment" {
	default = "eastus"
	}

	variable "location" {
	default = "eastus"
	}