• nmcli device status
• nmcli connection show <имя_интерфейса>
• nmcli connection show ens18
• nmcli connection modify <имя_интерфейса> ipv4.method manual ipv4.addresses '<IP/маска>' ipv4.gateway '<шлюз>' ipv4.dns '<DNS1>,<DNS2>'
• nmcli connection modify ens18 ipv4.method manual ipv4.addresses '192.168.11.249/24' ipv4.gateway '192.168.11.1' ipv4.dns '192.168.11.1,192.168.1.1'
• nmcli connection up ens18

nmcli device status

mcedit /etc/sysconfig/network-scripts/ifcfg-ens18

BOOTPROTO=static
IPADDR=192.168.11.249
NETMASK=255.255.255.0
GATEWAY=192.168.11.1
DNS1=192.168.11.1
ONBOOT=yes

или

NAME="ens18"
ONBOOT=yes
BOOTPROTO=static
HWADDR="ba:24:31:f5:52:11"
IPADDR="192.168.11.249"
NETMASK="255.255.255.0"
GATEWAY="192.168.11.1"
TYPE=Ethernet

systemctl restart network

или

nmcli networking off && nmcli networking on