Book Image

Linux for System Administrators

By : Viorel Rudareanu, Daniil Baturin
Book Image

Linux for System Administrators

By: Viorel Rudareanu, Daniil Baturin

Overview of this book

Linux system administration is an essential aspect of maintaining and managing Linux servers within an organization. The role of a Linux system administrator is pivotal in ensuring the smooth functioning and security of these servers, making it a critical job function for any company that relies on Linux infrastructure. This book is a comprehensive guide designed to help you build a solid foundation in Linux system administration. It takes you from the fundamentals of Linux to more advanced topics, encompassing key areas such as Linux system installation, managing user accounts and filesystems, networking fundamentals, and Linux security techniques. Additionally, the book delves into the automation of applications and infrastructure using Chef, enabling you to streamline and optimize your operations. For both newcomers getting started with Linux and professionals looking to enhance their skills, this book is an invaluable hands-on guide with a structured approach and concise explanations that make it an effective resource for quickly acquiring and reinforcing Linux system administration skills. With the help of this Linux book, you’ll be able to navigate the world of Linux administration confidently to meet the demands of your role.
Table of Contents (21 chapters)
Part 1: Linux Basics
Part 2: Configuring and Modifying Linux Systems
Part 3: Linux as a Part of a Larger System


dmesg is a command-line tool in Linux that allows you to view the kernel ring buffer messages. The kernel ring buffer is a circular buffer in memory that stores messages generated by the kernel, such as hardware events, device driver information, and system error messages.

The dmesg command displays the contents of this kernel ring buffer, allowing you to view messages that have been generated since the system was last booted. These messages can be useful for debugging system problems, identifying hardware issues, and monitoring system events.

Some of the common use cases of dmesg include the following:

  • Troubleshooting system issues: dmesg can be used to identify and diagnose system problems by displaying error messages, warnings, and other relevant information
  • Checking hardware status: dmesg can provide information about hardware devices and drivers, such as when a device is detected or when a driver fails to load
  • Monitoring system events: dmesg can be...