Nicolas RoToRx88

NB: This document describles a 'Old-School' way of using Yubikey with SSH

Modern OpenSSH has native support for FIDO Authentication. Its much simpler and should also be more stable with less moving parts. OpenSSH also now has support for signing arbitary files witch can be used as replacement of gnupg. Git also supports signing commits/tags with ssh keys.

Pros of FIDO

Simpler stack / less moving parts
Works directly with ssh, ssh-add and ssh-keygen on most computers
Simpler
Private key can never leave the FIDO device

Cons of FIDO

Increase key repeat rate on macOS

Settings: System Preferences » Keyboard » Key Repeat/Delay Until Repeat

Use the commands below to increase the key repeat rate on macOS beyond the possible settings via the user interface. The changes aren't applied until you restart your computer.

Source: https://apple.stackexchange.com/a/83923

My Vim-related gists

Long-form

This list is provided as a guide for tools engineers of all skill levels looking for jobs in the game industry. It's meant as a guide to topics that should be pursued broadly in order to be well spoken in an interview. I doubt any hiring manager requires deep knowedge across every topic, but an ideal candidate would be somewhat knowledgable (aware of its existence if asked directly) with all topics here.

Each list of bullets increases in difficulty, so later bullets are more applicable to senior (or even director) level candidates.

Good luck.

@gorlak

Math

Shortcut — Action

CTRL + A — Move to the beginning of the line
CTRL + E — Move to the end of the line
CTRL + [left arrow] — Move one word backward (on some systems this is ALT + B)
CTRL + [right arrow] — Move one word forward (on some systems this is ALT + F)
CTRL + U — (bash) Clear the characters on the line before the current cursor position
CTRL + U —(zsh) If you're using the zsh, this will clear the entire line
CTRL + K — Clear the characters on the line after the current cursor position
ESC + [backspace] — Delete the word in front of the cursor

Create Root CA (Done once)

Create Root Key

Attention: this is the key used to sign the certificate requests, anyone holding this can sign certificates on your behalf. So keep it in a safe place!

openssl genrsa -des3 -out rootCA.key 4096

Table Of Content

Skip to the relevant sections if needed.

2-min tutorial to do it the quick-and-dirty-way
Concepts for resolving Git conflicts
Setting up different editors / tool for using git mergetool
- Finding out what mergetool editors are supported
mergetool simple code example for vimdiff
- Resolving conflict from a Git pull
Other great references and tutorials

Vim cheat sheet

Starting Vim

vim [file1] [file2] ...

Remove white background color of an image in ImageMagick

$ convert  your.jpg  -transparent white  your.png

Flatten a transparent image with a white background:

	function vs()
	{
	RESULTS=`find . -type f -not -path '/\.' -not -path '/vendor/' -not -path '/packages/' -ipath "$1"`
	red() { echo -e "\033[00;31m$1\033[0m"; }
	NB_FILES=$(echo $RESULTS \| wc -w)
	if [ $NB_FILES -eq "1" ]; then
	$EDITOR $(echo "$RESULTS" \| head -n1 \| cut -d " " -f1)
	elif [ $NB_FILES -eq "0" ]; then
	>&2 red "No matching file"
	else