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mss/ifupdown-to-netplan.txt

Last active March 25, 2025 10:15
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Migrate from ifupdown to netplan
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ifupdown-to-netplan.txt
# Tested on an upgraded Ubuntu 20.04
apt install netplan.io
systemctl unmask systemd-networkd.service
systemctl unmask systemd-resolved.service
ENABLE_TEST_COMMANDS=1 netplan migrate
netplan try
reboot
apt purge ifupdown resolvconf
ln -sf /run/systemd/resolve/stub-resolv.conf /etc/resolv.conf
@fluidum
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fluidum commented Feb 23, 2024

Thanks for the author!

On Debian 12 I got couple of issues when I ran netplan try. I'll share my solutions:

  1. "Cannot call Open vSwitch: ovsdb-server.service is not running."

apt-get install openvswitch-switch
https://bugs.launchpad.net/ubuntu/+source/netplan.io/+bug/2041727

  1. "gateway4 has been deprecated, use default routes instead."

replaced:

      gateway4: 192.168.10.1

with:

     routes:
      - to: default
        via: 192.168.10.1

https://unix.stackexchange.com/a/681221

  1. My /etc/resolv.conf was emptied by NetworkManager somehow when turning WiFi off, so my eth0 wasn't resolving hostnames.

apt install systemd-resolved

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