The networking service fails to start / doesn't start on reboot.
Restarting networking (via systemctl): networking.serviceJob for networking.service failed because the control process exited with error code.
I can still access the server via remote console, but nothing else, since without network, there is no way out nor in.
systemctl status networking.service says:
● networking.service - Raise network interfaces
Loaded: loaded (/lib/systemd/system/networking.service; enabled; vendor prese
t: enabled)
Drop-In: /run/systemd/generator/networking.service.d
└─50-insserv.conf-$network.conf
Active: failed (Result: exit-code) since Mo 2016-04-18 06:53:11 UTC; 43s ago
Docs: man:interfaces(5)
Process: 3551 ExecStart=/sbin/ifup -a --read-environment (code=exited, status=
1/FAILURE)
Process: 3546 ExecStartPre=/bin/sh -c [ "$CONFIGURE_INTERFACES" != "no" ] && [
-n "$(ifquery --read-environment --list --exclude=lo)" ] && udevadm settle (cod
e=exited, status=0/SUCCESS)
Main PID: 3551 (code=exited, status=1/FAILURE)
Apr 18 06:53:11 h2502988.stratoserver.net ifup[3551]: For info, please visit htt
ps://www.isc.org/software/dhcp/
Apr 18 06:53:11 h2502988.stratoserver.net ifup[3551]: Usage: dhclient [-4|-6] [-
SNTP1dvrx] [-nw] [-p <port>] [-D LL|LLT]
Apr 18 06:53:11 h2502988.stratoserver.net ifup[3551]: [-s server
-addr] [-cf config-file] [-lf lease-file]
Apr 18 06:53:11 h2502988.stratoserver.net ifup[3551]: [-pf pid-f
ile] [--no-pid] [-e VAR=val]
Apr 18 06:53:11 h2502988.stratoserver.net ifup[3551]: [-sf scrip
t-file] [interface]
Apr 18 06:53:11 h2502988.stratoserver.net ifup[3551]: Failed to bring up eth0.
Apr 18 06:53:11 h2502988.stratoserver.net systemd[1]: networking.service: Main p
rocess exited, code=exited, status=1/FAILURE
Apr 18 06:53:11 h2502988.stratoserver.net systemd[1]: Failed to start Raise netw
ork interfaces.
Apr 18 06:53:11 h2502988.stratoserver.net systemd[1]: networking.service: Unit e
ntered failed state.
Apr 18 06:53:11 h2502988.stratoserver.net systemd[1]: networking.service: Failed
with result 'exit-code'.
My /etc/network/interfaces looks like:
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 inet dhcp
Where can I start to debug?
Thanks for any hint! Regards, K
# sudo ifup --verbose eth0
Configuring interface eth0=eth0 (inet)
/bin/run-parts --exit-on-error --verbose /etc/network/if-pre-up.d
run-parts: executing /etc/network/if-pre-up.d/ethtool
run-parts: executing /etc/network/if-pre-up.d/wireless-tools
run-parts: executing /etc/network/if-pre-up.d/wpasupplicant
/sbin/dhclient -1 -v -pf /run/dhclient.eth0.pid -lf /var/lib/dhcp/dhclient.eth0.leases -I -df /var/lib/dhcp/dhclient6.eth0.leases eth0
Internet Systems Consortium DHCP Client 4.2.4
Copyright 2004-2012 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Usage: dhclient <snip>
Failed to bring up eth0.
up
by executing, one by one, the scripts that are located in/etc/network/if-up.d
. One of these contains adhclient
command that fails. So do something likegrep -R dhclient /etc/network/if-up.d/*
and see what you get.sudo ifup --verbose eth0
to see where things go wrong?/var/log/syslog
. You could try to execute thedhclient
command manually on its own. If no error message follows, there is no issue withdhclient
.