set up a static IP address in Ubuntu 26.04, you can use the terminal via Netplan Configuration

 Method 1: Using Netplan (Recommended for Server & Terminal)

Find your interface name by running ip a:
bash
ip a
Use code with caution.
Look for your active network card name (such as ens18 or eth0).
Open the Netplan configuration file in /etc/netplan/:
bash
ls /etc/netplan/
sudo nano /etc/netplan/00-installer-config.yaml
Use code with caution.
(Note: The exact filename might vary, such as 01-netcfg.yaml or 50-cloud-init.yaml)
Edit the YAML file using 2 spaces for indentation (do not use tabs):
yaml
network:
  version: 2
  renderer: networkd
  ethernets:
    ens18:
      dhcp4: false
      addresses:
        - 192.168.1.100/24
      routes:
        - to: default
          via: 192.168.1.1
      nameservers:
        addresses:
          - 8.8.8.8
          - 1.1.1.1
Use code with caution.
(Replace ens18 with your interface name, and adjust the IP address, gateway via, and DNS addresses to fit your network).
Apply the changes:
bash
sudo netplan apply
Use code with caution.
You can use sudo netplan try first to safely test the configuration before committing

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