Serhii joyshmitz

So, I want to have a GPS Receiver driving a PPS (pulse-per-second) signal to the NTP server for a highly accurate time reference service.

Introduction

There are at least a couple of ways to propagate the PPS signal to the ntpd (NTP daemon) service, plus some variants in each case. However, the GPS device must be seen as a device that sources two different types of data:

the absolute date and time, and
the 1Hz clock signal (PPS).

The first one provides the complete information (incl. date and time) about when now is, but with poor accuracy because data is sent over the serial port and then encoded using a specific protocol such as NMEA (National Marine Electronics Association). PPS provides instead a very accurate clock but without any reference to absolute time.

Updated: 2022-07

Raspberry Pi-Hole VPN Setup

I wrote the first edition of this as a guide for myself at the end of 2017 - it was a mashup of Pi-Hole + PiVPN scripts and an IPsec script installed within a separate Raspian Docker image... and it actually worked!

But things have come a long way, and WireGuard happened - I've since streamlined and simplified my setup into a single Docker Compose script.

The steps below assume the following:

Semantic Commit Messages

See how a minor change to your commit message style can make you a better programmer.

Format: <type>(<scope>): <subject>

<scope> is optional

Example

1.) Download a Nerd Font

2.) Unzip and copy to ~/.fonts

3.) Run the command fc-cache -fv to manually rebuild the font cache

With heightening concern regarding the state of internet privacy (fuelled in part by the passing of the Investigatory Powers Act in the UK), I have set up a VPN server on the virtual server I have hosted with Mythic Beasts. This uses strongSwan and certificate-based IKEv2 authentication.

Assumptions:

Debian Jessie server already set up and accessible via debian.example.com, a public IPv4 of 203.0.113.1 and a public IPv6 of 2001:db8::1
Client username of me
Clients are running the latest versions of macOS and iOS (Sierra and 10 respectively at the time of writing)
No need to support any other operating systems (although the setup is easily translated)

For automated deployment of a similar setup, albeit Ubuntu-based and using ansible for deployment, I recommend you take a look at Algo VPN. I used that project as a basis for my configuration.

Project Title

One Paragraph of project description goes here

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.

	![Иллюстрация к проекту](https://github.com/jon/coolproject/raw/master/image/image.png)

	![Image alt](https://github.com/{username}/{repository}/raw/{branch}/{path}/image.png)

	{username} — ваш ник на ГитХабе;
	{repository} — репозиторий где хранятся картинки;
	{branch} — ветка репозитория;
	{path} — путь к месту нахождения картинки.