Luiz Fellipe Carneiro fellipec

Introduction

Pi-Hole's primary function is to be a DNS server with the ability to block domains, usually used for advertising, tracking or other unwanted sites. It also features a built-in DHCP Server.

Usually, your router will also have a built-in DHCP server, pre-configured from factory, and for most users this is perfectly fine. But in some cases you may want to run another DHCP server instead of relying on your router's one. This guide will help you understand how a DHCP server works and how to configure it without disturbing your network.

If you already know the networking basics, you can cut to the chase and read just the configuration part

Understanding the IP Addressing

To Linux evertything is a file.

When you run mkfs.ext4 /dev/sdx or mkfs.ext4 /dev/sdx1 or even mkfs.ext4 /tmp/dummyfile it doesn't care where it is creating your filesystem, it just does.

Let's demonstrate:

First, let's create a 1GB file in my home dir:

dd if=/dev/zero of=testfile bs=1G count=1 oflag=direct status=progress

Enable fingerprint authentication, but not for the first login

Install and enable the fingerprint authentication in pam

First, install the required packages and enable fingerprint support in the PAM configuration:

# Install the module
sudo apt install fprintd libpam-fprintd

Create LUKS Encrypted Disk Image

Create an empty virtual disk

dd if=/dev/zero of=/home/user/luksvolume1 bs=1M count=512

	#!/usr/bin/python3
	import gpsd
	import datetime
	import os
	from time import sleep
	from pyfiglet import Figlet

	#Figlet needs the terminal width to proper center the text
	col = os.get_terminal_size().columns

	Dryer Drying
	Filament Temperature Time (Hours)

	PLA 55°C (131°F) > 6
	ABS 65°C (149°F) > 6
	PETG 65°C (149°F) > 6
	Nylon 75°C (167°F) > 24
	Desiccants 65°C (149°F) > 6
	PVA 45°C (113°F) > 24
	TPU/TPE 55°C (131°F) > 8

	#!/usr/bin/bash

	# Change to recording directory
	cd /samba/ipcam

	# Amount of time of the recording session
	# Adjust to match the cron schedule
	end=$((SECONDS+3599))

	#/etc/udev/rules.d/99-usb-sync.rules
	# rule to disable write cache for usb storage
	# requires hdparm to be installed
	ACTION=="add\|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="/usr/bin/hdparm -W 0 /dev/%k"

	#!/bin/bash

	ping -c 1 1.1.1.1
	received=$?
	echo $received
	if [[ $received -ne 0 ]] ; then
	service NetworkManager restart
	fi

	ffmpeg -i http://192.168.1.150:8080/?action=stream -vsync cfr -r 0.1 -f image2 '/home/luiz/timelapse/img-%03d.jpg'
	ffmpeg -i '/home/luiz/timelapse/img-%03d.jpg' -c:v libx264 -crf 0 '/home/luiz/timelapse.mp4'