Set Static IP Address on Ubuntu Server

[Sumisu]

To set a static IP address, we are going to use netplan.

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First make sure that it is installed using this command:

sudo apt install openvswitch-switch-dpdk

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Next we need to figure out what interface our server is using. To do that we need to run:

ip route show

After we run the command we are looking for the interface. When I ran it, I got this:

default via 192.168.1.1 dev ens18 proto dhcp src 192.168.1.110 metric 100
192.168.1.0/24 dev ens18 proto kernel scope link src 192.168.1.110 metric 100
192.168.1.1 dev ens18 proto dhcp scope link src 192.168.1.110 metric 100

We need to find the line with 192.168.1.0/24. So my interface is going to be ens18

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Next we need to make the configuration file. I am going to use nano to do this.

sudo nano /etc/netplan/99_config.yaml

In the configuration file we need to add this:

network:
  version: 2
  renderer: networkd
  ethernets:
    ens18:
      dhcp4: no
      addresses:
        -  192.168.1.5/24
      routes:
        - to: default
          via: 192.168.1.1
      nameservers:
          addresses: [192.168.1.1, 8.8.8.8, 8.8.4.4]

Be sure to change the line under ethernets to your interface like I have here. Under addresses, this is where we are going to put the IP address we want to use: 192.168.1.5/24. If you are using nano, press Ctrl+X then Enter to save the file.

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After we make the configuration file, we need to set the permissions for the file. To do that we use this command:

sudo chmod 600 /etc/netplan/*

This will set all the configuration files in that directory to have the correct permissions.

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Now all we need to do is run this command:

sudo netplan apply

This will apply the configuration, now your IP address is set.

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One last thing that I like to do, is to remove this 192.168.1.1 dev ens18 proto dhcp scope link src 192.168.1.110 metric 100 configuration. To do that we need to run:

sudo ip route del 192.168.1.1

This will delete that configuration. Now everything should be set.