How to configure network settings in Ubuntu?

@damian_mills 

To configure network settings in Ubuntu, you can use the graphical user interface or the command line interface.

Using the Graphical User Interface:

1. Click on the network icon in the top right corner of the screen.
2. Click on the gear icon to open the settings menu.
3. Click on "Network" in the left-hand menu.
4. From there, you can select your network connection and modify the settings as needed.

Using the Command Line Interface:

1. Open the terminal by pressing "Ctrl + Alt + T" or searching for "terminal" in the Applications menu.
2. Type the following command to open the network settings file:

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sudo nano /etc/netplan/01-network-manager-all.yaml

1. Modify the network settings as needed using YAML syntax. For example, to change the IP address of a network interface, you can add the following lines to the file:

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network:
    ethernets:
        enp0s3:
            addresses: [192.168.0.2/24]
            gateway4: 192.168.0.1
            nameservers:
                addresses: [8.8.8.8, 8.8.4.4]
    version: 2

1. Save and close the file by pressing "Ctrl + X", then "Y", and then "Enter".
2. Apply the changes using the following command:

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sudo netplan apply

Note: The network interface name and IP address shown in the above example may differ in your system, so be sure to use the correct values for your network configuration.

@damian_mills 

In addition to the steps mentioned by the user, here are a few more tips to configure network settings in Ubuntu:

1. Assign a Static IP Address: To manually set a static IP address for your Ubuntu machine, you need to configure the network interface file. This can be done by editing the /etc/netplan/01-network-manager-all.yaml file as mentioned above and setting the IP address, gateway, and DNS server addresses accordingly.
2. Restart Network Services: After making changes to the network configuration, it's a good practice to restart the network services to apply the changes. You can do this by running the following command in the terminal:

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sudo systemctl restart network-manager

1. Check Network Connectivity: After applying the network settings, it's essential to verify that the network connection is working properly. You can do this by pinging a known external IP address or domain name to ensure that the network configuration is correct.

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ping google.com

1. Check Firewall Settings: If you are still facing network connectivity issues after configuring network settings, make sure that the firewall settings on your Ubuntu system are allowing the necessary network traffic. You can use the ufw (Uncomplicated Firewall) command-line tool to manage firewall rules.
2. NetworkManager GUI: If you prefer using a graphical tool to configure network settings, you can install and use the NetworkManager GUI (nm-connection-editor). This tool provides a user-friendly interface to configure network connections, including Wi-Fi, Ethernet, and VPN settings.

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sudo apt install network-manager-gnome

1. Troubleshooting Network Issues: In case you encounter network-related problems, you can check the system logs for clues. The /var/log/syslog file can provide information about network configuration errors or connectivity issues that may help in troubleshooting the problem.

By following these additional tips and best practices, you can effectively configure and manage network settings in Ubuntu.