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Initial checks

Start by checking that there aren't any previous ssh keys inside the FIDO2 authenticator of your YubiKey. You can check if they exist by running the command below:

nix shell nixpkgs#yubikey-manager -c ykman fido credentials list

If the command above outputs a string mentioning "ssh" or "openssh", then you have already got a key generated and store on your YubiKey.

Evaluating additional authentication factors

Before generating a new ssh key to store on your YubiKey you must consider which additional required authentication factors you want to use. Below you can see a table with the available factors and their corresponding command:

MaxwellDPS

ANSI Escape Sequences

Standard escape codes are prefixed with Escape:

• Ctrl-Key: ^[
• Octal: \033
• Unicode: \u001b
• Hexadecimal: \x1B
• Decimal: 27

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k3s etcd commands

etcd

Setup etcdctl using the instructions at https://github.com/etcd-io/etcd/releases/tag/v3.4.13 (changed path to /usr/local/bin):

Note: if you want to match th etcdctl binaries with the embedded k3s etcd version, please run the curl command for getting the version first and adjust ETCD_VER below accordingly:

curl -L --cacert /var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --cert /var/lib/rancher/k3s/server/tls/etcd/server-client.crt --key /var/lib/rancher/k3s/server/tls/etcd/server-client.key https://127.0.0.1:2379/version

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// decrypting Amtrak's real-time train location geoJSON feed
// based on https://github.com/Vivalize/Amtrak-Train-Stats
const fetch = require('node-fetch');
const CryptoJS = require('crypto-js');

// this is the xhr call done by https://www.amtrak.com/track-your-train.html containing encrypted train location data
const dataUrl = 'https://maps.amtrak.com/services/MapDataService/trains/getTrainsData';

// these constants are pulled from RoutesList.v.json, which is an object with keys 'arr', 's', and 'v'
const sValue = '9a3686ac'; // found at s[8]

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Installing NVIDIA CUDA on Azure NC with Tesla K80 and Ubuntu 16.04

State as of 2017-11-08.

You can also check a guide to upgrade CUDA on a [PC with with GTX 980 Ti and Ubuntu 16.04](https://gist.github.com/bzamecnik/61b293a3891e166797491f38d579d060.

Target versions

• NVIDIA driver 384.81

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import base64
import hashlib
import json
from urllib import request

from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
from cryptography.hazmat.backends import default_backend
    

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{
   "01": "Alabama",
   "02": "Alaska",
   "04": "Arizona",
   "05": "Arkansas",
   "06": "California",
   "08": "Colorado",
   "09": "Connecticut",
   "10": "Delaware",
   "11": "District of Columbia",

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UFW

I use Ubuntu’s Uncomplicated firewall because it is available on Ubuntu and it's very simple.

Install UFW

if ufw is not installed by default be sure to install it first.

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#!/usr/bin/env bash
#You'll need to enable IPMI over lan in idrac first
#iDRAC Settings -> Network -> IPMI Settings
#Channel Privilege Level Limit needs to be Administrator
#You may want to create a dedicated username/pass with IPMI permission in iDRAC Settings -> User Authentication
IPMIHOST=idracip
IPMIUSER=username
IPMIPW=password
IPMIEK=0000000000000000000000000000000000000000

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#deb cdrom:[Ubuntu 18.04 LTS _Bionic Beaver_ - Release amd64 (20180426)]/ bionic main restricted

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://us.archive.ubuntu.com/ubuntu/ bionic main restricted
# deb-src http://us.archive.ubuntu.com/ubuntu/ bionic main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://us.archive.ubuntu.com/ubuntu/ bionic-updates main restricted