YouSysAdmin

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.

YouSysAdmin

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.

YouSysAdmin

/**
* 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.

YouSysAdmin

-- 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,

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