artizirk

#!/usr/bin/env python3
""" XInput Game Controller APIs

Pure Python implementation for reading Xbox controller inputs without extra libs

Copyright (C) 2020 by Arti Zirk <arti.zirk@gmail.com>

Permission to use, copy, modify, and/or distribute this software for any purpose
with or without fee is hereby granted.

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/dts-v1/;
/plugin/;

/* Based on https://github.com/wens/linux/commits/sun4i-drm-tve-vga-wip */
/* Tested with Cubetruck */
/* save it somewhere and run sudo armbian-add-overlay vga.dts */

/ {
	compatible = "allwinner,sun4i-a10", "allwinner,sun7i-a20", "allwinner,sun8i-h3", "allwinner,sun50i-a64", "allwinner,sun50i-h5";

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/dts-v1/;
/plugin/;

/ {
	compatible = "friendlyelec,nanopi-r2", "rockchip,rk3328";

	fragment@0 {
		target-path = "/gpio-keys/button@0";
		__overlay__ {
			linux,code = <116>;

artizirk

#!/usr/bin/env python3
"""
This script implements systemd-nspawn MAC aadress generation algorithm
"""

import sys
import struct
from subprocess import run

import siphashc  # https://pypi.org/project/siphashc/

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ISC dhclient IPv6 prefix delegation hook script

Based on this https://gist.github.com/jayeye/689cb1de2275798659c58c62ab92cfaa

#!/usr/bin/env python3

import ipaddress
import os
import sys

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Based on this https://developer.atlassian.com/server/jira/platform/oauth/

generate private key

openssl genrsa -out jira_privatekey.pem 1024

generate public key

openssl req -newkey rsa:1024 -x509 -key jira_privatekey.pem -out jira_publickey.cer -days 365
openssl pkcs8 -topk8 -nocrypt -in jira_privatekey.pem -out jira_privatekey.pcks8

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This uses Linux kernel dyamic debug features

https://www.kernel.org/doc/html/latest/admin-guide/dynamic-debug-howto.html

This asumes that debugfs is mounted under /sys/kernel/debug

Enable WireGuard debug

echo 'module wireguard +p' | sudo tee /sys/kernel/debug/dynamic_debug/control

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#!/usr/bin/env python3
# need at least python3.6+ for blake2
from base64 import b64decode
from hashlib import sha256, blake2s
from ipaddress import ip_address, ip_network


# https://github.com/chmduquesne/wg-ip
def gen_ip(pubkey, subnet=ip_network('fe80::/64')):
    """Generate wg-ip compatible addresses from WireGuard public key.

artizirk

PostgreSQL optimize

ZFS Config

atime = off  # Recoding access time on file open is stupid
relatime = on  # writing access time on file write is fine because we are writing anyway.
compression = lz4  # Its faster to compress/decompress on the CPU than it is to wait for the data from HDD/SSD  
recordsize = 128K  # postgres native 8k will give give horrible compression ratio, default 128k is fine
primarycache = metadata  # maybe?

artizirk

#!/bin/bash
set -euo pipefail
BASE="/var/lib/machines"
ZDATA="rpool/machines"

if [[ $EUID -ne 0 ]]; then
   echo "This script must be run as root" 1>&2
   exit 1
fi