Book Image

Red Hat Enterprise Linux Troubleshooting Guide

By : Benjamin Cane
Book Image

Red Hat Enterprise Linux Troubleshooting Guide

By: Benjamin Cane

Overview of this book

Red Hat Enterprise Linux is an operating system that allows you to modernize your infrastructure, boost efficiency through virtualization, and finally prepare your data center for an open, hybrid cloud IT architecture. It provides the stability to take on today's challenges and the flexibility to adapt to tomorrow's demands. In this book, you begin with simple troubleshooting best practices and get an overview of the Linux commands used for troubleshooting. The book will cover the troubleshooting methods for web applications and services such as Apache and MySQL. Then, you will learn to identify system performance bottlenecks and troubleshoot network issues; all while learning about vital troubleshooting steps such as understanding the problem statement, establishing a hypothesis, and understanding trial, error, and documentation. Next, the book will show you how to capture and analyze network traffic, use advanced system troubleshooting tools such as strace, tcpdump & dmesg, and discover common issues with system defaults. Finally, the book will take you through a detailed root cause analysis of an unexpected reboot where you will learn to recover a downed system.
Table of Contents (19 chapters)
Red Hat Enterprise Linux Troubleshooting Guide
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Open source versus home-grown applications


Popular open source projects often have an online community or bug/issue tracker. As we experienced in Chapter 3, Troubleshooting a Web Application, these can be useful resources for troubleshooting application issues. Often, the issue has already been reported or asked about in these communities, with the majority of these posts also containing a solution for the issue.

These solutions are posted on the Internet in open forums; any errors from the application can also simply be searched for on Google. Most of the time, the search will show multiple possible answers. It is a pretty rare occurrence when an error from a popular open source application produces zero search results on Google.

With custom applications, however, application errors might not always be resolved with a quick Google search. Sometimes, an application provides a generic error such as Permission Denied or File not found. On other occasions, however, they produce no error or application...