Set Static IP Address on Deb 12

Set Static IP Address¶

To change the IP address on Deb 12, you can configure a static IP address either by:

Editing /etc/network/interfaces (used on older systems or when avoiding NetworkManager)
Using tools like nmcli or a graphical interface if NetworkManager is installed

Below is the method using the traditional /etc/network/interfaces approach.

Know your Interface Name First

Use the following command to identify your network interface name (e.g., eth0, enp0s3):

ip -c link show

Method 1: Using `/etc/network/interfaces` (Traditional Server Configuration)¶

This is a manual configuration approach suitable for servers or systems without NetworkManager.

🛡️ Step-by-step Instructions¶

Find your interface name:
```
ip -c link show
```

Backup your current config:

sudo cp /etc/network/interfaces /etc/network/interfaces.bak

Edit the network configuration file:
```
sudo vim /etc/network/interfaces
```

Add or modify the configuration:

Replace enp0s3, IP, netmask, gateway, and DNS as per your actual network details.

auto enp0s3
iface enp0s3 inet static
    address 192.168.42.100
    netmask 255.255.255.0
    gateway 192.168.42.1
    dns-nameservers 8.8.8.8 1.1.1.1

Apply the changes:

You can restart the networking service or the specific interface:

sudo systemctl restart networking
# or
sudo ifdown enp0s3 && sudo ifup enp0s3

Make sure you have console access

Misconfiguration can lead to loss of network access. Always ensure you have a way to revert if needed, especially when working remotely.

Additional Methods¶

For systems using NetworkManager, consider using:

nmcli (command-line)
NetworkManager GUI (nmtui or desktop interface)

Set Static IP Address on Deb 12