Kostas Kapenekakis ultim8k

Resize a VM system disk

Introduction

You have a VM with small disk
You have GPT partition table
You NOT USE LVM (you should)
You need to extend a partition on the main drive
You use Debian 8.x aka Jessie

Extend the disk

Physical backup and restore of MySQL data in a docker volume

Backup

Login to mysql shell for the container named mysql:

docker run --rm -it --link mysql:mysql mysql:5 mysql -h mysql -u root

Generating Authy passwords on other authenticators

*update: TBC, but this new might affect how easy it is to use this technique past August 2024: Authy is shutting down its desktop app | The 2FA app Authy will only be available on Android and iOS starting in August

This gist, based in part on a gist by Brian Hartvigsen, allows you to export from Authy your TOTP tokens you have stored there.
Those can be "standard" 6-digits / 30 secs tokens, or Authy's own version, the 7-digits / 10 secs tokens.

	#!/usr/bin/env bash

	set -Eeuo pipefail
	trap cleanup SIGINT SIGTERM ERR EXIT

	script_dir=$(cd "$(dirname "${BASH_SOURCE[0]}")" &>/dev/null && pwd -P)

	usage() {
	cat <<EOF
	Usage: $(basename "${BASH_SOURCE[0]}") [-h] [-v] [-f] -p param_value arg1 [arg2...]

	[Unit]
	Description=Keeps a tunnel to 'remote.example.com' open
	After=network.target

	[Service]
	User=autossh
	# -p [PORT]
	# -l [user]
	# -M 0 --> no monitoring
	# -N Just open the connection and do nothing (not interactive)

	# Backup
	docker exec CONTAINER /usr/bin/mysqldump -u root --password=root DATABASE > backup.sql

	# Restore
	cat backup.sql \| docker exec -i CONTAINER /usr/bin/mysql -u root --password=root DATABASE

	# Use this script to test that your Telegram bot works.
	#
	# Install the dependency
	#
	# $ gem install telegram_bot
	#
	# Run the bot
	#
	# $ ruby bot.rb
	#