How to configure a static IP address on Linux

In this tutorial, How to configure a static IP address on Linux. Step by step to make a static IP address on Linux.

Note: To change the network setting a good idea to make a copy of any configure file before your changes.

For RHEL 8

How to configure a static IP address on an RHEL system. using the nmcli command shown list network connections and devices on the system.

$ nmcli dev status

Now, To change the network interface from dynamic to static, you need edit file in folder “/etc/sysconfig/network-scripts”. In this example, I will create new file ifcfg-Comtrend7FB9

Configuring a static IP address as below

HWADDR=7C:67:2A:CC:DF:8F
ESSID=Comtrend7FB9
MODE=Managed
KEY_MGMT=WPA-PSK
SECURITYMODE=open
MAC_ADDRESS_RANDOMIZATION=default
TYPE=Wireless
IPADDR=192.168.3.4  # Ip address static for Linux server
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static      
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=Comtrend7FB9
UUID=3f5a6317-27c7-249f-bfaa-1d2fa5283482
ONBOOT=yes

Restarting NetworkManager.

$ sudo systemctl restart NetworkManager

For Ubuntu 18.10

Using nmcli (network manager command line interface) command to list the network interface on Ubuntu server.

$ nmcli d

Example, configure a static IP address on Ubuntu system.

# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
auto enp0s25
iface enp0s25 inet static
    address 192.168.3.4
    netmask 255.255.255.0
    network 192.168.3.1
    broadcast 192.168.3.255

Restart the networking service.

$ sudo  systemctl restart NetworkManager.service

Configure Static IP On CentOS 6

You can update/edit as follow static IP configure. Example, I will update for eth0 interface network.

HWADDR=00:08:A2:0B:BA:B7
TYPE=Ethernet
BOOTPROTO=none
# IP static for Server #
IPADDR=192.168.3.4
# Subnet #
PREFIX=24
# Set default gateway IP for server #
GATEWAY=192.168.3.1
# Set dns servers #
DNS1=192.168.3.1
DNS2=8.8.8.8
DNS3=8.8.4.4
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
# Disable ipv6 #
IPV6INIT=no
NAME=eth0
# This is system specific and can be created using 'uuidgen eth0' command #
UUID=31171a6f-bcg1-44de-8h6e-cf8e782f8bd6
DEVICE=eth0
ONBOOT=yes

Save and close the file. you need restart service network to apply the configure for eth0 interface network.

$ sudo systemctl restart network

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About HuuPV

My name is Huu. I love technology and especially Devops Skill such as Docker, vagrant, git so forth. I likes open-sources. so I created DevopsRoles.com site to share the knowledge that I have learned. My Job: IT system administrator. Hobbies: summoners war game, gossip.
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