Switching network configuration from ifupdown to netplan

In cloud servers created from pre-made images with the Ubuntu 18.04, 20.04, and 22.04 operating system, the ifupdown utility is used by default to configure the network.

You can switch network configuration from ifupdown to netplan; the procedure depends on whether the cloud-init agent is installed in the image.

Cloud-init is installed

1. Connect to the server.

2. Remove ifupdown:

   sudo apt purge ifupdown

3. Perform a soft restart of the server:

   sudo reboot now

   The cloud-init agent will automatically configure the network for netplan.

Cloud-init is not installed

1. Connect to the server.

2. Create a configuration file for netplan:

   nano /etc/netplan/config.yaml

3. Optional: add the necessary network settings to the file. For examples, see the Edit cloud server network configuration file instructions.

4. Check the file syntax:

   sudo netplan try

5. Apply the settings:

   sudo netplan apply