Linux Command: systemctl
Control systemd services, timers, sockets, and system state
Terminal — Systemd & Services
Command
$
systemctl list-units --type=service --state=failed
Output
UNIT LOAD ACTIVE SUB DESCRIPTION
php8.2-fpm.service loaded failed failed The PHP 8.2 FastCGI Process Manager
1 loaded units listed.
systemctl is the primary interface to systemd. Beyond start/stop/restart/status, use list-units --state=failed to audit health, list-timers for scheduled jobs, and edit service-name to safely override unit files via drop-ins.