Fehleranalyse: Dienst startet nicht

Schritt 1:

systemctl status Dienstname -l

z.B.:

systemctl status isc-dhcp-server.service -l

Ausgabe:

● isc-dhcp-server.service - ISC DHCP IPv4 server
     Loaded: loaded (/lib/systemd/system/isc-dhcp-server.service; enabled; vendor preset: enabled)
     Active: failed (Result: exit-code) since Thu 2021-06-17 11:29:47 CEST; 56s ago
       Docs: man:dhcpd(8)
    Process: 2167 ExecStart=/bin/sh -ec      CONFIG_FILE=/etc/dhcp/dhcpd.conf;      if [ -f /etc/ltsp/dhcpd.conf ]; then CONFIG_FILE=/etc/ltsp/dhcpd.conf; fi;      [ ->
   Main PID: 2167 (code=exited, status=1/FAILURE)

Schritt 2:

journalctl _PID=PID#

z.B.:

journalctl _PID=2167

Hier können ggfs. zielführende Fehlermeldungen erlangt werden