Services & Processes

Controlling systemd services with systemctl — starting, enabling, masking, reading unit files, and creating scheduled timers. Roughly 10% of the EX200 exam.

Service management (systemctl)

New

Start, stop, enable, disable, and mask systemd units. Inspect unit state with status, is-active, is-enabled, cat, and show.

~30 min~70% of domain🔒 Sign insystemctlstartstopenable

Systemd timers

New

Replace cron with systemd .timer units. Calendar schedules, monotonic timers, and the .service + .timer pair pattern.

~25 min~30% of domain🔒 Sign insystemdtimerOnCalendarOnBootSec

Process management (ps, kill, nice)

New

List processes with ps, send signals with kill, and adjust priority with nice/renice.

~25 min~20% of domain🔒 Sign inpskillnicerenice

Time services (timedatectl & chrony)

New

Set the system timezone, configure NTP with chrony, and verify time sync with timedatectl.

~20 min~15% of domain🔒 Sign intimedatectlchronychronydntp

Tuning profiles (tuned-adm)

New

Select and apply system tuning profiles with tuned-adm for workload optimization.

~15 min~10% of domain🔒 Sign intunedtuned-admprofilethroughput-performance