CentOS 8 Network Configuration

Mong Kok, Hongkong

Check your network settings with ip a and ip r:

ip a

2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether b0:6e:bf:1d:d3:2a brd ff:ff:ff:ff:ff:ff
    inet 192.168.2.111/24 brd 192.168.2.255 scope global noprefixroute enp2s0
       valid_lft forever preferred_lft forever
    inet6 fe80::2a48:7e58:daf5:872d/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever


ip r

default via 192.168.2.5 dev enp2s0 proto static metric 100 
192.168.2.0/24 dev enp2s0 proto kernel scope link src 192.168.2.111 metric 100

The current ethernet interface is enp2s0 and the gateway that is used is 192.168.2.5.

Alternatively, you can also run the following to find your active network interface:

nmcli connection show

NAME    UUID                                  TYPE      DEVICE 
enp2s0  280ed14d-7c8b-4586-853d-420df9f65412  ethernet  enp2s0

To edit the interface run:

nmtui-edit enp2s0

Make your changes and then restart your network interface:

ifdown enp2s0 && ifup enp2s0

Verify the changes you made, e.g. setting a different gateway:

ip r

default via 192.168.2.1 dev enp2s0 proto static metric 100 
192.168.2.0/24 dev enp2s0 proto kernel scope link src 192.168.2.111 metric 100