Andy Cook cookandy

YubiKey 4 series GPG and SSH setup guide

Written for fairly adept technical users, preferably of Debian GNU/Linux, not for absolute beginners.

You'll probably be working with a single smartcard, so you'll want only one primary key (1. Sign & Certify) and two associated subkeys (2. Encrypt, 3. Authenticate). I've published a Bash function which automates this slightly special key generation process.

Mesh network options:

Alfred 3 Workflows I'm Using

Generated with workflows2md.

Append to Journal by Chad Stovern
Audio Device by mikegrb
Bluetooth Toggle by Chris Streeter
Can I Use v1.3 by Will Farrell
Domainr by dingyi
Emoji v1.5.0 by Carlos Galdino

Prereq:

apt-get install zsh
apt-get install git-core

Getting zsh to work in ubuntu is weird, since sh does not understand the source command. So, you do this to install zsh

wget https://github.com/robbyrussell/oh-my-zsh/raw/master/tools/install.sh -O - | zsh

	[Unit]
	Description=Demonstrate Bash

	[Service]
	ExecStartPre=/usr/bin/bash -c "/usr/bin/systemctl set-environment MYVAR=$(( 2 + 2 ))"
	ExecStart=/usr/bin/echo "2 + 2 = ${MYVAR}"

	## From a post on the ML, apropos this:
	## http://lowlatencyweb.wordpress.com/2012/03/20/500000-requestssec-modern-http-servers-are-fast.
	## For sysctl.conf

	net.ipv4.tcp_slow_start_after_idle = 0


	echo "2048 64512" > /proc/sys/net/ipv4/ip_local_port_range
	echo "1" > /proc/sys/net/ipv4/tcp_tw_recycle
	echo "1" > /proc/sys/net/ipv4/tcp_tw_reuse