###### Procedure

1. Sign in as root user

2. Open `/etc/network/interfaces` with nano, e.g.

    ```
    nano /etc/network/interfaces
    ```

3. Ensure something similar to the following exists for the primary adapter:

    ```
    allow-hotplug eth0
    iface eth0 inet static
        address 192.168.1.100/24
        gateway 192.168.1.1
        dns-nameservers 192.168.1.1
    ```

    !!! info "Note"

        Substitute `eth0` for the true interface name of the device that will connect you to the LAN

    * The `/24` is the CIDR format of having a netmask of `255.255.255.0`. The non-CIDR equivalent is:

            address 192.168.1.100
            netmask 255.255.255.0

            # .../16 = 255.255.0.0
            # .../21 = 255.255.248.0

4. Save and run `systemctl restart networking && ifup eth0`

5. Run `ip address` and inspect the output for changes

###### Sources

<https://wiki.debian.org/NetworkConfiguration>