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I have attempted setting up a static IP for a server, under Ubuntu 18.04. I thought I had it working, but after restarting I found that my ethernet interface eno1 has been disabled. After re-enabling with sudo ifconfig eno1 up, it fails to get a IPv4 ip address.

I setup the static ip using the new netplan system (config below), and had it working with this configuration, but I no longer see netplan installed (sudo netplan apply yields netplan: command not found).

To summarize, two issues:

  • the interface was disabled and no longer gets IPv4
  • netplan is no longer installed?

Contents of /etc/netplan/01-netcfg.yaml:

network:
  version: 2
  renderer: networkd
  ethernets:
    eno1:
      dhcp4: no
      addresses: [192.168.1.5/24]
      gateway4: 192.168.1.1
      nameservers:
        addresses: [192.168.1.1]

I know it is probably not a network issue as I am able to use other computers (albiet via dhcp) just fine.

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It seems that netplan has been uninstalled for some reason.

Run these commands to re-install netplan:

sudo apt update
sudo apt install netplan.io

Reboot the machine. After that your configuration in /etc/netplan/01-netcfg.yaml should be processed.

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