Chronological list of the "systemd for Administrators" series published on 0pointer.net/blog:
- Part I: Verifying Bootup
- Part II: Which Service Owns Which Processes?
- Part III: How Do I Convert A SysV Init Script Into A systemd Service File?
- Part IV: Killing Services
- Part V: The Three Levels of "Off"
- Part VI: Changing Roots
- Part VII: The Blame Game
- Part VIII: The New Configuration Files
- Part IX: On /etc/sysconfig and /etc/default
- Part X: Instantiated Services
- Part XI: Converting inetd Services
- Part XII: Securing Your Services
- Part XIII: Log and Service Status
- Part XIV: The Self-Explanatory Boot
- Part XV: Watchdogs
- Part XVI: Gettys on Serial Consoles: and Elsewhere)
- Part XVII: Using the Journal
- Part XVIII: Managing Resources
- Part XIX: Detecting Virtualization
- Part XX: Socket Activated Internet Services and OS Containers
I believe the best place to find an updated list of the 'Systemd for Administrators' series is available here:
https://www.freedesktop.org/wiki/Software/systemd/
under the paragraph titled 'The systemd for Administrators Blog Series' (unsurprisingly :-))