Linux Without the Guesswork: Free Sample (systemd: Services and Timers)

A free sample of Linux Without the Guesswork: The Command Line, Permissions, systemd, SSH, Logs and Troubleshooting for Homelab Servers.

Inside: the cover and full table of contents, and all of Chapter 4, "systemd: Services and Timers": reading systemctl status, start vs enable, where unit files live, writing a service unit for your own app with its own user, EnvironmentFile and Restart=on-failure, drop-in overrides with systemctl edit, timers instead of cron with OnCalendar, Persistent= and systemd-analyze calendar, and a few lines of hardening, with the diagrams and the real commands.

The full 75-page book (PDF and EPUB, 21 diagrams) is $19 at https://payhip.com/b/LV4qz

The full book is also in a bundle: Everything Bundle: every ebook in the store, $89 · Homelab Bundle, $59.