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Raspberry Pi 4 - WiFi Access Point with DNS Blocking and Pi-Hole Integration

This tutorial will guide you through setting up a Raspberry Pi 4 as a WiFi Access Point (AP) and blocking specific DNS servers, using 8.8.8.8 as an example.

Why should you do this?

You're setting up a Raspberry Pi 4 as a WiFi Access Point (AP) to gain more control over your network, specifically to address limitations in your current router. The primary goal is to block specific DNS servers, like 8.8.8.8, which some devices, such as the Fire TV, use by default. By doing so, you aim to prevent these devices from bypassing your preferred DNS settings, which you've configured to block ads using Pi-Hole. This setup ensures a consistent ad-free experience across all devices connected to the AP, even if they have hardcoded DNS settings.

Prerequisites

• Raspberry Pi 4 (tested) or similar.

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Krishna's 2-cents:

My understanding of GitHub Action Workflow files

As far as I know (and in my opinion), focusing on these below potential inputs should be a good starting point for engineering language models for generating workflow files, not exclusive to GitHub Actions [CI/CD]:

• Workflow Name: A name for the workflow file, eg., "CI", "test", "deploy".
• On Events: What (kind of) events trigger the workflow. This could be any events such as 'push', 'pull_request', or a on complex structures, it could be an API call with payloads. But for now, focusing on simpler events, should get the job done.
• Environment Variables: Any environment variables that the workflow needs.
• Jobs: A list of jobs that the workflow should run. Imagine, complete a serives of sub-tasks to compete a bigger task. Each job is roughly an object should atleast contain the below:
  • Job Name

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cd /AppData/nextcloud

# Download latest version
sudo wget https://download.nextcloud.com/server/releases/nextcloud-<VERSION>.zip -O /AppData/nextcloud/nextcloud.zip 
sudo unzip /AppData/nextcloud/nextcloud.zip

# Stopping container
docker stop nextcloud-app-1

# Backup old files, move apps and old configurations.

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version: '3'

services:
  mariadb:
    image: mariadb:10.7.3-focal
    restart: always
    command: --transaction-isolation=READ-COMMITTED --binlog-format=ROW
    volumes:
      - /AppData/nextcloud/mariadb:/var/lib/mysql
    environment:

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Fancy MOTD for Raspberry Pi

Demo

Code

#!/bin/bash
# Login MOTD for Raspberry Pi
print_line () {
	for i in {0..50..1}

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Clear Systemd Journal Logs in Ubuntu 20.04

Systemd has its own logging system called the journal, and the log files are stored in /var/log/journal.

Check current disk usage of journal files

sudo journalctl --disk-usage

Rotate journal files

• Active journal files will be marked as archived, so that they are never written to in future.

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version: "3.9"
   
services:
  jupyter:
    image: jupyter/minimal-notebook
    container_name: jupyter
    ports:
      - "81:8888"
    volumes:
      - /home/kk/jupyter/notebooks:/home/jovyan/

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#!/usr/bin/env python3
# Service script for TorrentBox to periodically deletes files from a directory.
# Use systemctl to init a service.
import os
from datetime import datetime
import logging

logging.basicConfig(filename='delete_service.log',
                    format='%(asctime)s %(levelname)-8s %(message)s',
                    datefmt='%d-%m-%Y %H:%M:%S',

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#!/bin/bash
# For Updating Packages and Portainer
# Tested on Ubuntu 20.04
LATEST="`wget -qO- https://hub.docker.com/v1/repositories/portainer/portainer-ce/tags`"
LATEST=`echo $LATEST | sed "s/{//g" | sed "s/}//g" | sed "s/\"//g" | cut -d ' ' -f2`

RUNNING=`docker inspect "portainer/portainer-ce" | grep Id | sed "s/\"//g" | sed "s/,//g" |  tr -s ' ' | cut -d ' ' -f3`

if [ "$RUNNING" != "$LATEST" ];then

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#!/usr/bin/env bash
# Last Updated June 2, 2020
# Tested on Ubuntu Server 20.04 LTS

# Variables for pretty printing
RED=`tput bold``tput setaf 1` # Red Color
GREEN=`tput bold``tput setaf 2` # Green Color
NC=`tput sgr0` # No Color
BEGIN=$(df /home --output=used | grep -Eo '[0-9]+')