Oleksii Samoliuk YouSysAdmin

Description

This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.

The script is here:

#!/bin/bash
convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"

Results

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.

Installing Arch Linux with Full Disk Encryption

If you're aiming for a seamless Arch Linux installation in UEFI mode, follow along as this guide will walk you through the process step by step. We'll be using LUKS (Linux Unified Key Setup) and LVM (Logical Volume Manager) partitions on LUKS to achieve full disk encryption.

Note: I have updated this doc for UEFI mode. For those with BIOS/MBR systems, you can refer to the previous version, but keep in mind that it might be outdated and no longer accurate.

If you're only interested in installing Linux and not setting up dual boot with Windows, feel free to skip the Windows-related sections.

Install ARCH Linux with encrypted file-system and UEFI

This guide was originally taken from: https://gist.github.com/mattiaslundberg/8620837 and updated to markdown as well as adding desktop and wireless setup

Download the archiso image from https://www.archlinux.org/ Use etcher to create USB drive: https://etcher.io/

	-- Thank @sbengo to figure out foreign_keys constraints is defaults to false in sqlite
	-- Enable to delete logs by cascading delete
	PRAGMA foreign_keys = ON;

	WITH n_build_ids_per_repo as (
	SELECT build_id
	FROM (
	SELECT
	build_id,
	build_repo_id,

	/**
	* Find the amount of auto-increment "space" has been used. This may can help identify
	* tables that are running out of available ID values.
	*/
	SELECT
	t.table_name,
	t.column_name,
	-- The highest possible ID that can be created with this data-type.
	t.max_value,
	-- The last ID created in this table.


	colors:
	# Default colors
	primary:
	background: '0x1e2127'
	foreground: '0xabb2bf'

	# Bright and dim foreground colors
	#
	# The dimmed foreground color is calculated automatically if it is not present.