grin lyoshenka

Operational PGP

This is a guide on how to email securely.

There are many guides on how to install and use PGP to encrypt email. This is not one of them. This is a guide on secure communication using email with PGP encryption. If you are not familiar with PGP, please read another guide first. If you are comfortable using PGP to encrypt and decrypt emails, this guide will raise your security to the next level.

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

Encrypted laptop setup

Btrfs on main drive, replacing GPT/MBR
Encrypted main drive using key file on flash drive. Add backup passphrase
No swap, swap files (limitation of Btrfs) or swap partition (so no suspend-to-disk)
Boot directory and grub on flash drive
1st flash drive partition is Vfat partition to allow for cross-platform file transfers
Ext4 ISO partition for Linux-only data/ISO files, if desired.
TODO - edit grub to allow booting ISOs stored on the flash drive.

Prolog

Google Chrome Developers says:

The new WOFF 2.0 Web Font compression format offers a 30% average gain over WOFF 1.0 (up to 50%+ in some cases). WOFF 2.0 is available since Chrome 36 and Opera 23.

Some examples of file size differences: WOFF vs. WOFF2

TTF to WOFF2 converting

http://www.fontsquirrel.com/tools/webfont-generator

Intro

The plan is to create a pair of executables (ngrok and ngrokd) that are connected with a self-signed SSL cert. Since the client and server executables are paired, you won't be able to use any other ngrok to connect to this ngrokd, and vice versa.

DNS

Add two DNS records: one for the base domain and one for the wildcard domain. For example, if your base domain is domain.com, you'll need a record for that and for *.domain.com.

	# execute this script by running the following command as root on your droplet:
	# bash -c "$(curl -fsSL https://gist.githubusercontent.com/felixfischer/09b3925afa33c5e4c60d/raw/gitlab2dokku.sh)"
	# inspired by http://blog.bytemark.co.uk/2014/05/23/deploy-gitlab-on-your-own-server-using-dokku

	mkdir -p /var/lib/dokku/plugins
	cd /var/lib/dokku/plugins

	git clone https://github.com/statianzo/dokku-supervisord.git dokku-supervisord
	dokku plugins-install

	# Allow read-only ZoL commands to be called through sudo without a password.

	# Cmnd alias specification
	Cmnd_Alias RO_ZFS = \
	/sbin/zfs "", /sbin/zfs help *, \
	/sbin/zfs get, /sbin/zfs get *, \
	/sbin/zfs list, /sbin/zfs list *, \
	/sbin/zpool "", /sbin/zpool help *, \
	/sbin/zpool iostat, /sbin/zpool iostat *, \
	/sbin/zpool list, /sbin/zpool list *, \

	# The blog post that started it all: https://neocities.org/blog/the-fcc-is-now-rate-limited
	#
	# Current known FCC address ranges:
	# https://news.ycombinator.com/item?id=7716915
	#
	# Confirm/locate FCC IP ranges with this: http://whois.arin.net/rest/net/NET-165-135-0-0-1/pft
	#
	# In your nginx.conf:

	location / {

	package main

	import (
	"encoding/json"
	"errors"
	"flag"
	"fmt"
	"io/ioutil"
	"log"
	"net"

	# Assuming an Ubuntu Docker image
	$ docker run -it <image> /bin/bash