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)

Using cURL, wget, and OpenSSL for remote web issues

If you've come to the conclusion that during your immense troubleshooting session that the issue you're facing is one of the following, then some of these tools might be for you:

  • Something to do with the connectivity to a remote site
  • Something to do with the certificates associated with a remote site

Getting ready

SSH to your CentOS VM:

$ vagrant ssh centos1
cURL and OpenSSL should be universal at this point, and you can expect a system to have them by default.

Wget is a bit more elusive, and is rarely part of a default install, but it's easy enough to install:

$ sudo yum install wget -y
At the moment, OpenSSL is everywhere, but due to a string of high-profile...