[CentOS] Centos7: Intel nuc/Linksys usb-ethernet

[Patrick Laimbock]

Hi,

Suggestions inline.

On 21-02-17 21:03, johan.vermeulen7 at telenet.be wrote:
[snip]
>
> Next I cannot launch the network:
>
> [root at clgmol ~]# systemctl status network
> ● network.service - LSB: Bring up/down networking
> Loaded: loaded (/etc/rc.d/init.d/network; bad; vendor preset: disabled)

Your network.service is still disabled so try enabling it:

# systemctl stop NetworkManager.service
# systemctl disable NetworkManager.service
# systemctl enable network.service
# systemctl start network.service
# systemctl status network.service

If the network.service fails, see below, review, fix and try again.

> Active: failed (Result: exit-code) since di 2017-02-21 20:57:56 CET; 15s ago
> Docs: man:systemd-sysv-generator(8)
> Process: 2638 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=1/FAILURE)
> CGroup: /system.slice/network.service
> └─1076 /sbin/dhclient -H clgmol -1 -q -lf /var/lib/dhclient/dhclient-13b56b89-7b1d-42fa-aeb7-af96a38102ce-enp3s0.lease -pf /var/run/dhclient-enp3s0.pid en...
>
> feb 21 20:57:56 clgmol.router network[2638]: RTNETLINK answers: File exists
[snip]

IIRC make dhclient release the current lease and stop the running DHCP 
client, then remove any lingering leases files:

# dhclient -r
# rm -v -i /var/lib/dhclient/dhclient*.lease*

Also remove any /etc/sysconfig/network-scripts/ifcfg-* files created by 
NetworkManager that might interfere with your ifcfg-enp0s20u3c2 and the 
network.service. Then try to start the network.service again.

HTH,
Patrick