kikitux

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. 

kikitux

# variables

variable "environment" {
  default = "eastus"
}

variable "location" {
  default = "eastus"
}

kikitux

name of the doc

text

title	title
line1	line1

continent	country	capital
europe	italia	no_idea

kikitux

{
    "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",

kikitux

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
 

kikitux

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

kikitux

#!/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) \

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:

kikitux

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 ''
}

kikitux

==> 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