Home/ Questions/Q 1748
Next
In Process

askthedev.com Latest Questions

Asked: 2024-09-23T17:34:34+05:30 In:

What steps do I need to follow to configure a static IP address on my Ubuntu system?

I’m diving into some networking stuff, and I hit a bit of a wall. I need to configure a static IP address on my Ubuntu system, and honestly, the whole thing is kind of confusing to me. I’ve read through some tutorials, but they all seem to skip over the little details or make it sound way simpler than it actually is.

So here’s the scoop: I’m working with Ubuntu 20.04, and I want to set up a static IP for my home network because I’m tired of my IP changing every time I reboot my router or my computer. I’ve tried the usual methods, but I keep feeling like I’m missing something crucial.

First off, I’m not even sure which file I’m supposed to edit to set the static IP. I came across the `/etc/netplan/` directory, and I think that’s where I need to go, but there are a bunch of YAML files in there, and I’m nervous about messing something up. I know YAML is all about those spaces and indentation, and it feels like the slightest mistake could break the whole configuration.

Then there’s the whole question of what values to actually put in! I mean, do I need to know my current IP configurations, like the subnet mask and gateway? And how do I find out what DNS servers to use? Is there a way to use my router as a DNS server, or should I just stick with Google’s 8.8.8.8?

Lastly, once I do make the changes, how do I apply them? Do I just reboot my system, or is there a command I need to run to make sure everything takes effect?

If anyone out there has gone through this process and can break it down into simple, clear steps, I would be super grateful. I’m sure I’m not the only one who has found this a bit daunting! Thank you in advance for any help or tips you can share!

Netplan
Share

    Leave an answer

    You must login to add an answer.

    Need An Account,

    2 Answers






    1. Configuring Static IP on Ubuntu 20.04

      To configure a static IP address on your Ubuntu 20.04 system, you will need to edit a YAML file located in the /etc/netplan/ directory. Begin by identifying the correct YAML file; usually, there is a file named something like 01-netcfg.yaml or similar. You can open this file in a text editor (like nano or vim) with elevated privileges. The structure of the YAML file is crucial, so ensure that you maintain proper indentation. Here’s a basic example configuration for setting a static IP:

      network:
    version: 2
    renderer: NetworkManager
    ethernets:
        eth0:
            dhcp4: no
            addresses: [192.168.1.100/24]
            gateway4: 192.168.1.1
            nameservers:
                addresses: [8.8.8.8, 8.8.4.4]

      In this example, replace `eth0` with your actual interface name (you can find this using the command ip a). You will need to enter your desired static IP address (in this case, 192.168.1.100), your netmask (typically /24 for home networks), and your default gateway (usually your router’s IP address, e.g., 192.168.1.1). For DNS servers, you can either use your router’s IP or public DNS servers like Google’s (8.8.8.8). After saving your changes, apply the configuration with the command sudo netplan apply. This will update your network settings without requiring a reboot.




    2. Setting Up a Static IP on Ubuntu 20.04

      Setting Up a Static IP on Ubuntu 20.04

      Don’t worry, I got you covered! Configuring a static IP on Ubuntu can indeed be a bit tricky, especially if you’re not very familiar with the process. Let’s break it down step by step!

      1. Check Your Current IP Configuration

      First, you need to know your current IP settings. You can do this by opening a terminal and running:

      ip a

      Look for the section that corresponds to your network interface (like eth0 or enp3s0). Take note of the following:

      • Current IP address (e.g., 192.168.1.5)
      • Subnet mask (often 255.255.255.0, in CIDR it would be /24)
      • Gateway (this is usually your router’s IP, like 192.168.1.1)

      2. Edit the Netplan Configuration

      Yes, you’re right about the /etc/netplan/ directory! You’ll want to edit the appropriate YAML file there. To see what files you have, run:

      ls /etc/netplan/

      Open the file with a text editor, like nano:

      sudo nano /etc/netplan/your-file.yaml

      Make sure to replace your-file.yaml with the actual file name.

      3. Configure the Static IP

      Inside the YAML, you should see a structure like this:

      network:
    version: 2
    ethernets:
        your-interface-name:
            addresses: [your-desired-ip]
            gateway4: your-gateway-ip
            nameservers:
                addresses: [your-dns1, your-dns2]

      Here’s what to replace:

      • your-interface-name: Like enp3s0 (check with ip a).
      • your-desired-ip: This is the static IP you want (e.g., 192.168.1.100).
      • your-gateway-ip: This is your router’s IP.
      • your-dns1 and your-dns2: You can use your router’s IP or Google’s (8.8.8.8 and 8.8.4.4).

      Remember to keep the indentation correct (YAML is picky about spaces!).

      4. Apply Your Changes

      After saving your changes (in nano, press CTRL + X, then Y, and then Enter), you need to apply them. Run:

      sudo netplan apply

      This will activate your new static IP configuration without a reboot!

      5. Verify the Configuration

      To make sure everything worked, run:

      ip a

      Check if your static IP is set correctly. If you encounter any issues, you can always revert your changes in the YAML file.

      That’s it! You’re now set up with a static IP address! If you have any more questions or get stuck, don’t hesitate to ask. Good luck!


    Related Questions