Book Image

Linux Administration Cookbook

By : Adam K. Dean
Book Image

Linux Administration Cookbook

By: Adam K. Dean

Overview of this book

Linux is one of the most widely used operating systems among system administrators,and even modern application and server development is heavily reliant on the Linux platform. The Linux Administration Cookbook is your go-to guide to get started on your Linux journey. It will help you understand what that strange little server is doing in the corner of your office, what the mysterious virtual machine languishing in Azure is crunching through, what that circuit-board-like thing is doing under your office TV, and why the LEDs on it are blinking rapidly. This book will get you started with administering Linux, giving you the knowledge and tools you need to troubleshoot day-to-day problems, ranging from a Raspberry Pi to a server in Azure, while giving you a good understanding of the fundamentals of how GNU/Linux works. Through the course of the book, you’ll install and configure a system, while the author regales you with errors and anecdotes from his vast experience as a data center hardware engineer, systems administrator, and DevOps consultant. By the end of the book, you will have gained practical knowledge of Linux, which will serve as a bedrock for learning Linux administration and aid you in your Linux journey.
Table of Contents (15 chapters)

Starting and stopping services

In this section, we're going to look at the trivial-but-important aspect of starting and stopping services.

Imagine a world without the ability to automatically start daemons when a box boots; you'd have to manually go in and start your services with every reboot, being careful to ensure you start your services in the appropriate way each time.

That world, like one dominated by the Stargate Replicators, isn't one in which I'd want to live.

How to do it...

We're going to use postfix in this example, as it's a service that won't be doing much of anything on our VM.

postfix is a Mail Transport Agent (MTA) typically installed on CentOS boxes. Even if your box...