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Guide to Connecting to a Bluetooth Device using `bluetoothctl`

This guide walks you through the process of connecting to a Bluetooth device on a Linux system using the bluetoothctl command-line tool. It covers initial setup, scanning, pairing, and connecting procedures, along with troubleshooting tips.

Prerequisites

A Linux distribution with Bluetooth support (e.g., Arch Linux).
The bluez package installed, which provides bluetoothctl and related utilities.
A working Bluetooth adapter installed on your system.
Sudo privileges to execute commands that require root access.

Available Public Wildcard DNS Domains pointing to localhost (127.0.0.1)

The best way to safely and securely use local domains pointing to 127.0.0.1 is to edit your local settings (/etc/hosts) and add your own settings. Keep in mind if you want to use subdomains, you need to enter all variations.

Example:

# Adding bottom of your current file /etc/hosts
################# MY LOCAL DOMAINS
127.0.0.1 local.com admin.local.com
127.0.0.1 domain1.com

Overview

This is a bash script that will automatically turn your wifi off if you connect your computer to an ethernet connection and turn wifi back on when you unplug your ethernet cable/adapter. If you decide to turn wifi on for whatever reason, it will remember that choice. This was improvised from this mac hint to work with Yosemite, and without hard-coding the adapter names. It's supposed to support growl, but I didn't check that part. I did, however, add OSX notification center support. Feel free to fork and fix any issues you encounter.

Most the credit for these changes go to Dave Holland.

Requirements

Mac OSX 10+
Administrator privileges

Deconstructing `fib.so`, a minimal sBPF program

For this deconstruction, we will be researching fib.so, a hand-rolled sBPF assembly program that calculates the fibonacci number based upon a u8 input.

Structure of an sBPF program

The structure of an sBPF program has 4 sections:

1. ELF Header

The starting point of the file, describing the overall file format, target environment, and offsets for program and section headers.

2. Program Headers

Define the memory segments and their attributes (readable, writable, executable) for runtime execution.

How to unpack .wpress archive files created by the All-in-one-Wp-Migration Wordpress plugin

Recently I needed to download some files from a Wordpress installation where the client only gave me access to the admin dashboard. Fortunately the All-in-One WP Migration plugin was already installed, so I could take a quick backup of the whole site by downloading the installed plugins, theme and database. To my surprise downloading the backup from the All-in-One WP Migration plugin only gave me a single compressed migration.wpress file that any unpack tool refused to extract. A little web search brought me to a five year old tool called Wpress-Extractor but the provided binaries for MacOS refused to work because the package was already too old.

So I decided to rewrite this little helpful tool in Node.js to make it cross-platform compatible for Windows, MacOS and Linux.

Ok here it is: A simple 2-step tutorial how to extract a file with the .wpress extension on your computer:

Step

WSL list

Get-ChildItem "HKCU:\Software\Microsoft\Windows\CurrentVersion\Lxss" -Recurse

Move WSL to another drive/PC

wsl --export Ubuntu .\Ubuntu\ext4.vhdx --vhd
wsl --unregister Ubuntu
wsl --import-in-place Ubuntu .\Ubuntu\ext4.vhdx

WSL export/import cheat sheet

Reference: Setting up multiple WSL distribution instances

List distros

\> wsl --list
Windows Subsystem for Linux Distributions:
docker-desktop (Default)

Set Windows 10/11 default terminal for admin and user-level privileges

This tutorial allows you to manually set version of microsoft/terminal to be used as default terminal with and without administrative privileges on Microsoft Windows 10 or 11.

Note

This tutorial is for educational purposes only. I am not responsible for any damages that may have caused this. By attempting to follow this guide, you are on your own risk.

Instructions.

Download unpackaged version of Microsoft Terminal from GitHub. You can find latest working version for this guide here..

[!NOTE]

	#!/usr/bin/env python3

	# original: https://raw.githubusercontent.com/tweksteen/jenkins-decrypt/master/decrypt.py
	# requires: pycrypto


	import re
	import sys
	import base64

	export default {
	async fetch(request) {
	const url = new URL(request.url);
	const path = url.pathname.replace(/^\/+/, "");
	const parts = path.split("/");
	if (parts.length < 4) {
	return new Response("Usage: /owner/repo/branch/path/to/file.ext", { status: 400 });
	}
	const [owner, repo, branch, ...filePathParts] = parts;
	const filePath = filePathParts.join("/");