ageis

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.

ageis

#!/bin/bash

function stop () {
    sudo systemctl stop "$1"
    sleep 3s
}

function start () {
    sleep 3s
    sudo systemctl start "$1"

ageis

bitcoind-monitor.py

This is a script written in Python intended to run alongside a Bitcoin node and export statistics for monitoring purposes. It assumes the existence of bitcoin-cli in the PATH and access to the RPC interface over localhost.

It tracks stuff like: block height, difficulty, number of peers, network hash rate, errors, uptime in seconds, mempool size, size of recent blocks, number of transactions within blocks, chaintips, total bytes received and sent, and transaction inputs and outputs. These Bitcoin metrics are refreshed once every 5 minutes.

How it works

Prometheus is a monitoring system and time-series database.

ageis

zcash-monitor.py

This is a script written in Python intended to run alongside a Zcash node and export statistics for monitoring purposes. It assumes the existence of zcash-cli in the PATH and access to the RPC interface over localhost.

It tracks stuff like: block height, difficulty, number of peers, network solutions per second, errors, mempool size, size of recent blocks, number of transactions within blocks, chaintips, total bytes received and sent, transaction inputs and outputs, and the make-up of transactions in terms of JoinSplits, shielded, unshielded or mixed. These Zcash metrics are refreshed once every 2 minutes.

How it works

Prometheus is a monitoring system and time-series database.

ageis

#!/bin/bash
# Measures ICMP and DNS latency to many popular public DNS servers.
# Works concurrently or in parallel.
# Author: Kevin M. Gallagher (@ageis)
#set -x
#set -e
#set -o nounset
#set -v

export ERRFILE="./testdns_errs.txt"

ageis

function updateall() {
    #set -o pipefail noclobber erexit
    set -v
    #set -e
    #set -x
    function exit_error() {
        echo "You can only run updateall() once at a time." >&2
    }
    function status() {
        echo "Exit code is $1"

ageis

#!/usr/bin/python
# -*- coding: utf-8 -*-
""" Simple Prometheus exporter for traffic metrics 
from a running Tor daemon. """
import re
import time
import sys
from prometheus_client import start_http_server, Gauge
import stem
from stem.control import Controller

ageis

#!/bin/bash
# Installs as many fonts for Figlet/Toilet as possible from multiple sources.
# Author: Kevin M. Gallagher (@ageis)

#set -u
#set -x
export FIGLET_FONT_DIR=$(figlet -I2)
export TMP_FONT_DIR="$(pwd)/fonts"
export TMP_DEST_DIR="$(pwd)/tmp"
export FONT_REGEX=".*\.\(flf\|tlf\|flc\)$"

ageis

Usage: apt-get -o "Dpkg::options==--option" --reinstall install <package>

$ dpkg --force-help
  [!] all                Set all force options
  [*] downgrade          Replace a package with a lower version
      configure-any      Configure any package which may help this one
      hold               Process incidental packages even when on hold
      not-root           Try to (de)install things even when not root
      bad-path           PATH is missing important programs, problems likely
      bad-verify         Install a package even if it fails authenticity check

ageis

http://ubuntu.unc.edu.ar/ubuntu/
http://mirrors.asnet.am/ubuntu/
http://mirror.aarnet.edu.au/pub/ubuntu/archive/
http://mirror.waia.asn.au/ubuntu/
http://ubuntu.melbourneitmirror.net/archive/
http://ubuntu.mirror.solnode.io/ubuntu/
http://ftp.iinet.net.au/pub/ubuntu/
http://mirror.as24220.net/pub/ubuntu-archive/
http://mirror.as24220.net/pub/ubuntu/
http://mirror.intergrid.com.au/ubuntu/