Book Image

Linux Service Management Made Easy with systemd

4 (1)
Book Image

Linux Service Management Made Easy with systemd

4 (1)

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 the systemd executables

Normally, we would search for a program's executable files in either a bin/ or an sbin/ directory, and you will indeed find some of the systemd utility executable files there, but most of the systemd executables are found instead in the /lib/systemd/ directory. To save space, here's just a partial listing:

donnie@donnie-TB250-BTC:/lib/systemd$ ls -l
total 7448
-rw-r--r--  1 root root 2367728 Feb  6  2020 libsystemd-shared-237.so
drwxr-xr-x  2 root root    4096 Apr  3  2020 network
-rw-r--r--  1 root root     699 Feb  6  2020 resolv.conf
-rwxr-xr-x  1 root root    1246 Feb  6  2020 set-cpufreq
drwxr-xr-x 24 root root   36864 Apr  3  2020 system
-rwxr-xr-x  1 root root 1612152 Feb  6  2020...