rhakbari / pi-hole-scripts

DNS Monitor Script

This script monitors the average ping to a specified host (e.g., Cloudflare DNS) and dynamically changes the DNS settings based on the ping performance. If the average ping exceeds a high threshold for a specified number of consecutive checks, it switches to an alternative DNS (e.g., Google DNS). Conversely, if the ping falls below a low threshold for consecutive checks, it switches back to the original DNS.

Prerequisites

• The script is written in Bash and requires a Unix-like operating system (e.g., Linux, MacOS).
• Administrative privileges may be required to change DNS settings.

Usage

1. Clone the repository:

   git clone https://github.com/rhakbari/dns-monitor-script.git

2. Make the script executable:

   chmod +x dns_monitor.sh

3. Run the script in the background:

   ./dns_monitor.sh &

For Running the Python Script on Every Boot in Debian

This guide demonstrates how to set up a systemd service to run a Python script automatically on every boot in Debian.

Prerequisites

• Debian-based distribution (e.g., Debian, Ubuntu)
• Python script to run on boot

Steps

1. Create a systemd Service File:

   • Create a .service file for your Python script. For example, let's assume your Python script is named tplink_dns.py, and it's located in /path/to/script.

   • Open a terminal and create a file named myscript.service in the /etc/systemd/system/ directory:

     sudo nano /etc/systemd/system/myscript.service

   • Add the following content to the myscript.service file:

     [Unit]
     Description=My Python Script Service
     After=multi-user.target
     
     [Service]
     Type=simple
     ExecStart=/usr/bin/python3 /path/to/script/tplink_dns.py
     Restart=always
     
     [Install]
     WantedBy=multi-user.target

   • Replace /path/to/script with the actual path to your Python script.

2. Enable the Service:

   • After creating the service file, reload systemd and enable the service:

     sudo systemctl daemon-reload
     sudo systemctl enable myscript.service

3. Start the Service:

   • Start the service immediately without rebooting:

     sudo systemctl start myscript.service

4. Verification:

   • You can check the status of the service using:

     sudo systemctl status myscript.service

   • Ensure that your script has the necessary permissions to execute and read any files it needs.