How to Set Up a Static IP on Ubuntu 24.04

Setup static IP

Setting up a static IP on Ubuntu 24.04 requires editing the Netplan configuration file in your terminal to replace DHCP with your chosen permanent IP address, subnet mask, gateway, and DNS servers. This ensures your computer always keeps the exact same network address whenever it connects to your router.

Ubuntu will also come with a default network config YAML file for your device containing automatically generated information that is not persistent.

sudo mv /etc/netplan/50-cloud-init.yaml /etc/netplan/50-cloud-init.yaml.bak

Next, run the command below to create a new network configuration file.

sudo nano /etc/netplan/01-netcfg.yaml

Then, enter the following network configuration details to use a static IP address for your device.

network:
  ethernets:
    ens33:
      dhcp4: false
      addresses: [192.168.156.130/24]
      routes:
        - to: default
          via: 192.168.156.2
          metric: 100
      nameservers:
        addresses: [192.168.156.2,192.168.156.3]
        search: [srv1.example.com,svr1.geek.net]
      dhcp6: false
  version: 2

Save and exit.

Descriptions:

• ens33: ==> interface name. (Yours might be different than mine)
• addresses: ==> IP address and network mask
• routes: ==> default gateway
  • [metric]: set priority (specify it if multiple NICs available)
  • lower value is higher priority
• nameservers: ==> DNS server addresses
• search: ==> DNS search base

Next, adjust the permissions to protect the file and apply your settings.

sudo chmod 600 /etc/netplan/01-netcfg.yaml
sudo netplan apply

Display IP address

Checking your IP address on Ubuntu 24.04 takes just one terminal command to confirm your network settings are working. Run the ip address show command to view all active network interfaces and verify that your new permanent IP address is correctly assigned to your system.

ip address show

The command should output something similar to the one below.

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host noprefixroute 
       valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:0c:29:bc:b2:46 brd ff:ff:ff:ff:ff:ff
    altname enp2s1
    inet 192.168.156.130/24 brd 192.168.156.255 scope global noprefixroute ens33
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:febc:b246/64 scope link 
       valid_lft forever preferred_lft forever

That should do it!

Conclusion:

Setting up a static IP address on Ubuntu 24.04 ensures a stable network configuration for essential devices. You can effectively manage your server's connectivity by following the outlined steps. Here are some key takeaways:

• A static IP address, such as servers and printers, is crucial for devices requiring consistent network presence.
• Modifying network configurations on Ubuntu server involves editing the YAML file under /etc/netplan/.
• Always back up the default configuration file before making changes.
• Adjusting file permissions and applying the settings ensures security and functionality.
• You can verify the static IP setup using the ip address show command to confirm the changes.

Implementing these steps will help you maintain an efficient and reliable networking environment.