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Asked: 2024-09-24T11:09:19+05:30 In:

What are the steps to configure a static IP address on an Ubuntu system?

I’ve been diving into some network configuration stuff recently and hit a bit of a wall with setting up a static IP address on my Ubuntu machine. I know there are a lot of you out there who have probably done this before, so I thought I’d reach out and see if anyone can help me out.

Here’s the thing: I understand that having a static IP can be super useful for things like hosting a server or accessing a device on your network consistently. But every time I read up on it, it feels like I’m sifting through a ton of technical jargon that makes it all sound way more complicated than it probably is. I remember doing something similar on Windows with just a few clicks, but Ubuntu has me scratching my head.

So, if you’ve gone through this process, can you outline the steps you took to get it done? Maybe start from the beginning? Like, do I need to do something in the terminal? I’ve seen people mention editing the Netplan configuration files, but I’m not too sure where to find those or what exactly to change. And what about DNS settings? Do I need to mess with those as well?

Also, I’ve heard there’s a difference in how this is done in different versions of Ubuntu, so if you could mention which version you’re using, that’d be awesome. I’m currently on Ubuntu 20.04, so any specific instructions or tips related to that would be super helpful!

Lastly, if something goes wrong, how do I revert the changes? It’s a bit nerve-wracking thinking about losing my internet connection because I messed something up.

Thanks in advance for any help you can offer! I really appreciate it, and I’m sure others could benefit from this information as well. Looking forward to your responses!

Netplan
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    2 Answers



    1. Setting Up Static IP on Ubuntu 20.04

      How to Set a Static IP Address on Ubuntu 20.04

      If you’re looking to set a static IP on your Ubuntu 20.04 machine, I totally get how overwhelming it can feel! Here’s a step-by-step guide that breaks it down into simple, manageable steps.

      Step 1: Identify Your Network Interface

      First, you need to figure out what your network interface is called. Open your terminal and type:

      ip a

      Look for something like eth0, enp3s0, or wlan0 depending on whether you’re using Ethernet or Wi-Fi. Remember the name!

      Step 2: Edit the Netplan Configuration

      You’ll be editing the Netplan configuration files. These are usually located in /etc/netplan/. To find them, run:

      ls /etc/netplan/

      There should be a file with a .yaml extension, like 01-netcfg.yaml. Now, you can edit this file with your preferred text editor. For example:

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

      Step 3: Configuring the Static IP

      Once you have it open, you’ll want to set your static IP. Here’s a simple example of what it might look like:

      network:
    version: 2
    renderer: networkd
    ethernets:
        eth0:
            dhcp4: no
            addresses: [192.168.1.100/24] # Your desired static IP
            gateway4: 192.168.1.1        # Your router's IP
            nameservers:
                addresses: [8.8.8.8, 8.8.4.4] # Google DNS

      Just replace eth0 with your network interface name, 192.168.1.100 with your chosen static IP, and 192.168.1.1 with your router’s IP. Also, feel free to change the DNS servers if you want!

      Step 4: Apply the Configuration

      After you’ve made your edits, save the file (in Nano, you can do this by pressing CTRL + X, then Y, and hit Enter to confirm). Now, back in the terminal, run:

      sudo netplan apply

      Step 5: Check if It Worked

      You can check if your static IP is set by running:

      ip a

      Hopefully, you’ll see your new static IP listed there. 🎉

      What If Something Goes Wrong?

      If you get locked out (like losing your internet), don’t worry! You can always revert back to DHCP. Just go back to the Netplan file and change:

      dhcp4: no

      to:

      dhcp4: yes

      Then apply the changes again using sudo netplan apply.

      It might seem tricky, but it really can be straightforward once you follow these steps. Good luck, and I hope this helps!



    2. To set up a static IP address on your Ubuntu 20.04 machine, you’ll primarily work with Netplan, which is the default network configuration tool. Start by opening the terminal and navigating to the Netplan configuration directory. You can do this by executing `cd /etc/netplan`. You should find a YAML file there, typically named something like `01-netcfg.yaml`. Open this file in a text editor, such as nano, with the command `sudo nano 01-netcfg.yaml`. In this file, look for the section corresponding to your network interface (e.g., `eth0` for Ethernet). You will need to change the `dhcp: true` line to `dhcp: false` and add your static IP configuration under that, formatted like this:

            network:
        version: 2
        renderer: NetworkManager
        ethernets:
          eth0:
            addresses: [192.168.1.100/24]  # Replace with your desired static IP
            gateway4: 192.168.1.1           # Your network's gateway
            nameservers:
              addresses: [8.8.8.8, 8.8.4.4] # DNS servers

      After making these changes, save the file and exit the text editor. You can apply the changes by running `sudo netplan apply`. If something goes wrong, you can revert the changes by either editing the YAML file back to its original state or by disabling the static IP entry by running `sudo netplan apply` again after restoring the original settings. It’s a good practice to back up the original YAML file before making any modifications, using `sudo cp 01-netcfg.yaml 01-netcfg.yaml.bak` just in case you need to restore it later. This process should establish a static IP address on your device while allowing you to access it consistently on your network.


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