PID 1

In WSL

systemctl status your_service
System has not been booted with systemd as init system (PID 1). Can't operate.
Failed to connect to bus: Host is down

Related

• kill

See also

• PID, PID 1, Process identifier (PID), pidstat, Hidepid, /proc/$PID/
• WSL, PID 1, WSL2