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mich0w0h

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Configure Static IP in Ubuntu 22.04

#ubuntu #network #linux #beginners

Configuring Ubuntu 22.04 to Use a Static IP Address

In this article, I'll go through the steps to configure a static IP address on Ubuntu 22.04 while using a WiFi connection.

Note that my Ubuntu Server used a DHCP-assigned IPv4 address on a WiFi connection before working on this setup.

Prerequisites

Before proceeding, you need to gather some information:

  1. Check the IP address of the default gateway: 
ip route show default
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This command will show the default route and the corresponding gateway IP address.

  1. Check the subnet mask: 
ip addr show
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This command will display the IP addresses and subnet masks for all interfaces.

  1. Note the gateway address and desired static IP address to assign In my case, the gateway address is 192.168.10.1, and I decided to assign the static IP address 192.168.10.100/24.

Configuring the Static IP Address

  1. Open the network configuration file with a text editor. For example, using nano: 
sudo nano /etc/netplan/<target-configuration-file>.yaml
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In my case, I'm using a WiFi connection, so I'll choose the WiFi-specific configuration file.

  1. Modify the configuration file by adding the following lines under the wifis section for your WiFi interface (e.g., wlan0): 
wifis:
  wlan0:
    dhcp4: no
    addresses: [192.168.10.100/24]
    routes:
      - to: default
        via: 192.168.10.1
    nameservers:
      addresses: [192.168.10.1, 8.8.8.8, 8.8.4.4]
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addresses and default routes will be the ones you've noted above.

  1. Verify the new network configuration: 
sudo netplan try
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This command will check the syntax of the configuration file and show you the changes that will be made. You might see a warning about ovsdb-server.service not running, but you can ignore it for now.

  1. If the verification is successful, apply the new network configuration: 
sudo netplan apply
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  1. Verify that the static IP address has been assigned correctly: 
ip addr show
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You should see your new static IP address listed under the WiFi interface (wlan0).

  1. Verify the connection by pinging the static IP address from another device on the same home network: 
ping 192.168.10.100
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And yes! It worked!

PING 192.168.10.100 (192.168.10.100): 56 data bytes
  64 bytes from 192.168.10.100: icmp_seq=0 ttl=64 time=54.810 ms
  64 bytes from 192.168.10.100: icmp_seq=1 ttl=64 time=68.789 ms
  64 bytes from 192.168.10.100: icmp_seq=2 ttl=64 time=85.646 ms
  64 bytes from 192.168.10.100: icmp_seq=3 ttl=64 time=106.507 ms
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That's it! You've successfully configured Ubuntu 22.04 to use a static IP address on your WiFi connection.

References

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