Unlocked - Secrets To Time Synchronization On A Linux Vps

How to Install, Configure & Track Chrony - The Right Way

What you'll learn

Describe why the inclusion of The Leap Seconds in UTC is important to keep time in sync with The Universe.

Describe the NTP Daemon, Systemd Timesyncd Service, and Chrony, along with their shortcomings and advantages.

Learn how to Remove NTP Daemon and Systemd Timesyncd Service.

Install Chrony and Enable Logging.

Add additional timeservers to Chrony's configuration for resiliency and redundancy.

Describe NTP Metrics such as Residual Frequency, Skew, Root delay, etc.

Explain NTP Metrics such as Poll, Reach, LastRx, Margin of Error, etc.

Use the gathered metrics to select superior timeservers to achieve better time accuracy for your VPS.

Stress test Chrony to understand its time correctional behavior.

Requirements

You should have a basic understanding on Linux commands and have a running VPS.

We officially support Debian. If Chrony is already running on your server then it doesn't matter whether you're running Ubuntu, RedHat etc. you will be able to follow through.

Description

By the end of this course, you will be able to:Describe in simple terms The Greenwich Mean Time (GMT), Universal Time Coordinated (UTC), and The Leap Seconds.Describe why the inclusion of The Leap Seconds in UTC is important to keep time in sync with The Universe.Check how different apps use different timezones.Set the proper timezone for your server and ensure that all the apps and services on your server use the same timezone.Describe in simple words the Network Time Protocol (NTP) along with its shortcomings and alternatives.Describe the NTP Daemon, Systemd Timesyncd Service, and Chrony, along with their shortcomings and advantages.Check if NTP Daemon, Systemd Timesyncd Service, or Chrony is running on your server.Remove NTP Daemon and Systemd Timesyncd service.Install Chrony.Describe Debian Vendor Zone and NTP Pool Project.Enable Chrony logging.Add additional timeservers to Chrony's configuration for resiliency and redundancy.Describe the syntax of the chronyc command.Use the chronyc tracking command to view Chrony Performance Metrics.Describe NTP Metrics such as Residual Frequency, Skew, Root delay, etc.Describe how NTP Metrics are utilized to select the primary reference timeserver.Use the chronyc sources command to view NTP Performance Metrics for different timeservers.Explain NTP Metrics such as Poll, Reach, LastRx, Margin of Error, etc.Use the gathered metrics to select superior timeservers to achieve better time accuracy for your VPS.Stress test Chrony to understand its time correctional behavior.Describe how a change in the local time affects the "System Time" and other metrics.Calculate the slew rate Chrony applies to the System clock to correct it at different times.Determine approximately in how much time Chrony corrects large time anomalies.

Overview

Section 1: Introduction

Lecture 1 Introduction

Lecture 2 Class 1 - The Time & The Timezones

Lecture 3 Class 2 - NTP & NTP Apps

Lecture 4 Class 3 - Chrony Installation/Configuration

Lecture 5 Class 4 - Chrony Tracking Metrics

Lecture 6 Class 5 - Chrony Sources Metrics

Lecture 7 Class 6 - Chrony Stress Test

Lecture 8 Bonus Lecture

Anyone running Linux either as a server or on desktop.,Windows is not supported.