How to Change IP Address on Linux (Terminal Commands)

Tutorial shows you, how to change IP address on Linux using terminal commands (set a static IP in Linux), Set IP address, Default Gateway and DNS server manually and get an IP address from DHCP server

Find IP address Linux:
The “ifconfig” command is used for displaying current network configuration information.

Find default gateway Linux:
The “route” command is used for displaying default Gateway.

Find DNS server IP Linux:
The "cat /etc/resolv.conf" command is used for displaying DNS Server IP Address.

Setting your IP manually

To assign an IP address on a Linux, you need to use following commands, example:

Command to change IP address:
“sudo ifconfig eth0 192.168.1.112/24”

Command to add default gateway:
“sudo route add default gw 192.168.1.1”

Command to add DNS server IP:
“echo nameserver 192.168.1.1 "Type BRACKET" /etc/resolv.conf”

Note for DNS command: If you are not login as a root you may get Error :
(bash: /etc/reslov.conf: Permission denied),
So, first type “sudo su” command and then type DNS command.

In order to get an IP from a DHCP server, example:

First type "sudo dhclient -r eth0" to release your IP address.

Then type "sudo dhclient eth0" to renew it.


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