Book Image

Linux Essentials - Second Edition

By : Christine Bresnahan, Richard Blum
Book Image

Linux Essentials - Second Edition

By: Christine Bresnahan, Richard Blum

Overview of this book

Linux Essentials, Second Edition provides a solid foundation of knowledge for anyone considering a career in information technology, for anyone new to the Linux operating system, and for anyone who is preparing to sit for the Linux Essentials Exam. Through this engaging resource, you can access key information in a learning-by-doing style. Hands-on tutorials and end-of-chapter exercises and review questions lead you in both learning and applying new information—information that will help you achieve your goals! With the experience provided in this compelling reference, you can sit down for the Linux Essentials Exam with confidence. An open-source operating system, Linux is a UNIX-based platform that is freely updated by developers. The nature of its development means that Linux is a low-cost and secure alternative to other operating systems, and is used in many different IT environments. Passing the Linux Essentials Exam prepares you to apply your knowledge regarding this operating system within the workforce.
Table of Contents (19 chapters)

Using Log Files

Many programs that run in the background (daemons) write information about their normal operations to log files, which record such notes. Consulting log files can therefore be an important part of diagnosing problems with daemons. The first step in doing this is to locate your log files. In some cases, you may need to tell the program to produce more-verbose output to help track down the problem. In this section, you’ll learn some pointers on how to do that. Finally, this section describes the kernel ring buffer, which isn’t technically a log file but can fill a similar role for kernel information.

Locating Log Files


Linux stores most log files in the /var/log directory tree. Table 9.2/var/log. If you experience problems with such a server, checking its log files can be a good place to start troubleshooting.