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PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

• -E: will describe the underlaying queries of the \ commands (cool for learning!)
• -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

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resource "tls_private_key" "ca" {
  algorithm = "RSA"
}

resource "tls_self_signed_cert" "ca" {
  key_algorithm   = "RSA"
  private_key_pem = "${tls_private_key.ca.private_key_pem}"

  subject {
    common_name  = "${var.domain}"

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title	subtitle	author	date	source
Docker Compose Cheatsheet	Quick reference for Docker Compose commands and config files	Jon LaBelle	April 7, 2019	https://jonlabelle.com/snippets/view/markdown/docker-compose-cheatsheet

Basic config example

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Installing Kubernetes on ArchLinux

Packages

pacman -S curl docker ebtables ethtool wget unzip

Also cfssl is needed but available on AUR, using pacaur

pacaur -S cfssl

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AWS Golang SDK examples

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AWS S3 bucket and IAM policy recipes

• Anonymous GET access
• Anonymous GET access - match HTTP referrer
• Full access for specific IAM user/role
• GET/PUT/DELETE access to specific path within a bucket
• Restricted LIST & PUT/DELETE access to specific path within a bucket
• Full access (and S3 console) for specific IAM users
• Reference

Anonymous GET access

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Common Options

-#, --progress-bar Make curl display a simple progress bar instead of the more informational standard meter.

-b, --cookie <name=data> Supply cookie with request. If no =, then specifies the cookie file to use (see -c).

-c, --cookie-jar <file name> File to save response cookies to.

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(defun source (filename)
  "Update environment variables from a shell source file."
  (interactive "fSource file: ")

  (message "Sourcing environment from `%s'..." filename)
  (with-temp-buffer

    (shell-command (format "diff -u <(true; export) <(source %s; export)" filename) '(4))

    (let ((envvar-re "declare -x \\([^=]+\\)=\\(.*\\)$"))

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require 'openssl'
require 'base64'

# ===== \/ sign =====
# generate keys
key = OpenSSL::PKey::EC.new("secp256k1")
key.generate_key
public_key = key.public_key
public_key_hex = public_key.to_bn.to_s(16).downcase # public key in hex format

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# derived from http://h2np.net/tips/wiki/index.php?RubyOpenSSLDigitalSignatureSample

require 'openssl'
require 'base64'
include OpenSSL

group_name = 'secp521r1'
message = '10000 fartbux sent to bryce from a can of beans'
key = PKey::EC.new(group_name)
key = key.generate_key