Book Image

Mastering Bash

By : Giorgio Zarrelli
Book Image

Mastering Bash

By: Giorgio Zarrelli

Overview of this book

System administration is an everyday effort that involves a lot of tedious tasks, and devious pits. Knowing your environment is the key to unleashing the most powerful solution that will make your life easy as an administrator, and show you the path to new heights. Bash is your Swiss army knife to set up your working or home environment as you want, when you want. This book will enable you to customize your system step by step, making your own real, virtual, home out of it. The journey will take you swiftly through the basis of the shell programming in Bash to more interesting and challenging tasks. You will be introduced to one of the most famous open source monitoring systems—Nagios, and write complex programs with it in any languages. You’ll see how to perform checks on your sites and applications. Moving on, you’ll discover how to write your own daemons so you can create your services and take advantage of inter-process communication to let your scripts talk to each other. So, despite these being everyday tasks, you’ll have a lot of fun on the way. By the end of the book, you will have gained advanced knowledge of Bash that will help you automate routine tasks and manage your systems.
Table of Contents (15 chapters)

Summary

We are now able to send formatted messages to the #test channel, but is this all we can do with this script? No, as you will learn over time with a bit more experience, programming is also setting a scope to our efforts: we must define our goals, plan accordingly, accomplish them, and assess the results. Overdoing, in a professional environment, breaks one of the fundamental rules of the project management, the so-called iron triangle that defines the quality of a project as the intersection between scope, time, and costs that are the top three constrains driving us in creating our programs. Spend too long on a program or exceed the goals, the cost will levitate and the overall quality, not the quality of the code, but of our project, will be impacted.

This script was an example on how to plan and execute, how to check for the information we need to code a working script...