you can check your machine’s current ip with: ip addr show

to modify your network interface address setting simply use the nmtui tool:

this failed me once with “no Update2” method… so let’s move on to the…

manual way:

terminal mode: activate network on boot

ifup.centos7.man.txt

search how to set fixed ip on centos7

which ifup
/usr/sbin/ifup
file /usr/sbin/ifup
/usr/sbin/ifup: Bourne-Again shell script, ASCII text executable

vim /etc/sysconfig/network

example content:

[root@CentOS7 ~]# cat /etc/sysconfig/network
# Created by anaconda
NETWORKING=yes
[root@CentOS7 ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
TYPE=Ethernet
BOOTPROTO=dhcp
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=eth0
UUID=1f926ad0-9cd9-4adb-b8ec-5993ae40e333
DEVICE=eth0
ONBOOT=yes <- change this, it is no per default, which means no auto startup of network, then reboot system.

/etc/sysconfig/network-scripts/ifcfg-<configuration>
The file defining an interface.

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