Start with the topic guide.
Linux distributions, the filesystem hierarchy, users and groups, permissions and ownership, package management, systemd and services, processes and signals, logs and journald, networking commands, SSH, disks and storage, scheduled jobs, shell configuration, and server hardening.
This is a learning outline. A complete worked tutorial has not been published for this topic yet.
Concept scope
Linux Administration: 14 short lessons, one for each concept. Linux distributions, the filesystem hierarchy, users and groups, permissions and ownership, package management, systemd and services, processes and signals, logs and journald, networking commands, SSH, disks and storage, scheduled jobs, shell configuration, and server hardening.