Book Image

Linux Service Management Made Easy with systemd

4.5 (2)
Book Image

Linux Service Management Made Easy with systemd

4.5 (2)

Overview of this book

Linux Service Management Made Easy with systemd will provide you with an in-depth understanding of systemd, so that you can set up your servers securely and efficiently.This is a comprehensive guide for Linux administrators that will help you get the best of systemd, starting with an explanation of the fundamentals of systemd management.You’ll also learn how to edit and create your own systemd units, which will be particularly helpful if you need to create custom services or timers and add features or security to an existing service. Next, you'll find out how to analyze and fix boot-up challenges and set system parameters. An overview of cgroups that'll help you control system resource usage for both processes and users will also be covered, alongside a practical demonstration on how cgroups are structured, spotting the differences between cgroups Version 1 and 2, and how to set resource limits on both. Finally, you'll learn about the systemd way of performing time-keeping, networking, logging, and login management. You'll discover how to configure servers accurately and gather system information to analyze system security and performance. By the end of this Linux book, you’ll be able to efficiently manage all aspects of a server running the systemd init system.
Table of Contents (23 chapters)
1
Section 1: Using systemd
12
Section 2: Understanding cgroups
16
Section 3: Logging, Timekeeping, Networking, and Booting

Understanding GRUB2

The original GRUB, which is now referred to as GRUB Legacy, first came on the scene in 1995 as a replacement for the old LILO bootloader. It was easy to work with because it was easy to configure and it was implemented consistently on all Linux distros that used it. Unlike LILO, it can boot non-Linux operating systems. So, you can install Windows and Linux on the same computer, and GRUB lets you choose which one to boot up. GRUB Legacy worked well on the old BIOS-based computers, but it doesn't work with the newer EFI/UEFI computers. (Well, actually, the Fedora team did create a forked version of GRUB Legacy that would work with EFI/UEFI, but they abandoned it in favor of GRUB2 in 2013.)

GRUB2 isn't an update of GRUB Legacy. Instead, it's a whole new bootloader that was created from scratch. Now, I have to tell you that there are both good things and bad things about it. The good thing is that it can work with the new EFI/UEFI computers. The bad...