journalctl -u

• journalctl -u wpa_supplicant
• journalctl -u kubelet
• journalctl -u prometheus
• journalctl -u yourservicename
• journalctl -u yourservice-name.service

• Main process exited, code=exited, status=1/FAILURE

See also

• systemd, .service, /lib/systemd/system/, /etc/systemd/system/, Type=, systemctl list-units --type=service, systemctl daemon-reload, ExecStart, .timer, .mounts, .wants, .socket
• systemd-journald: journalctl, /etc/systemd/journald.conf, journalctl logs, journalctl --list-boots, journalctl --disk-usage, journalctl -u kubelet, journalctl -u prometheus, journalctl --help