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)
1
Part 1: Linux Basics
7
Part 2: Configuring and Modifying Linux Systems
13
Part 3: Linux as a Part of a Larger System

Discovering USB devices

To discover USB devices, there’s the lsusb utility from the usbutils package. That command does not require root privileges. Here’s what its output may look like:

$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 1bcf:2b98 Sunplus Innovation Technology Inc. Integrated_Webcam_HD
Bus 001 Device 036: ID 0b0e:0300 GN Netcom Jabra EVOLVE 20 MS
Bus 001 Device 035: ID 05ac:12a8 Apple, Inc. iPhone 5/5C/5S/6/SE
Bus 001 Device 006: ID 8087:0aaa Intel Corp. Bluetooth 9460/9560 Jefferson Peak (JfP)
Bus 001 Device 002: ID 047d:1020 Kensington Expert Mouse Trackball
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Even though the USB bus specification also includes standardized device classes, lsusb does not show them by default. One reason for that behavior is that a single USB device may implement multiple functions. A smartphone, for example, can present itself as a mass storage device (similar...