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CentOS

Networking

Manual

ip addr add 192.168.0.2/24 dev eth0
ip route add devault via 192.168.0.1

Static

Create or edit a file /etc/sysconfig/network-scripts/ifcfg-eth0 with content:

DEVICE=eth0
IPV6INIT=no
IPV6_AUTOCONF=no
ONBOOT=yes
IPADDR=192.168.0.2
NETMASK=255.255.255.0
GATEWAY=192.168.0.1
NM_CONTROLLED=no