Ubuntu 20.04 add network bridge (br0) with nmcli command

In Ubuntu 20.04, you can add a network bridge (br0) using the nmcli command-line tool. Here are the steps you can follow:

1. Start by making sure that the network-manager package is installed by running the following command:

2. Next, you can create a new bridge by running the following command:

3. To add an interface to the bridge, you can run the following command:

Replace interface-name with the actual name of the interface you want to add to the bridge, e.g. eth0.

4. To activate the bridge, you can run the following command:

5. To check the status of the bridge, you can run the following command:

6. If you want to remove the bridge, you can run the following command:

7. It’s important to keep in mind that creating a bridge may disrupt network connectivity, so it’s a good idea to test the bridge in a non-production environment before applying it to production.
8. Also, note that creating a bridge will also require you to configure the IP address, mask and gateway for the bridge interface.
9. You may also need to configure DNS server and DHCP server if they are needed.