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Leandro
Asked: 2024-08-07 21:31:05 +0800 CST

How to make network settings permanent?

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I have Ubuntu 24.04 and a local network. I try to configure in the Network settings a wired connection with manual IPv4 mode, static IP address, I apply it and it works, but after a while it is still trying to get an address through DHCP. I reopen the network dialog and it came back to Automatic (DHCP), though my static address still works. Restarting didn't change anything. It's like "Apply" is not saving my settings.

After many tries to reconnect through DHCP, it gives up and disables the connection, rendering the static IP unusable.

I tried also creating a configuration file in /etc/netplan/ or editing /etc/netplan/01-network-manager-all.yaml, but to no avail, same behavior.

networking

1 Answers

  1. Best Answer

    Try this:

    Find out how your ethernet card is identified

    Running:

             ip add

    Suppose it is enp0s2

    Now configure the 00-installer-config.yaml file

    Run:

             sudo nano /etc/netplan/00-installer-config.yaml

    It will have content similar to this

    # This is the network config written by 'subiquity'
network:
  ethernets:
    enp0s2:
      dhcp4: true
  version: 2

    Modify the contents of the file, using your own parameters, so that it looks similar to the following, use your own values, not the ones in the example.

    # This is the network config written by 'subiquity'
network:
 ethernets:
  enp0s2:
     addresses:
     - 192.168.100.110/24
     dhcp4: false
      routes:
       - to: default
         via: 192.168.100.1
     nameservers:
        addresses:
          - 8.8.8.8
          - 8.8.4.4
  version: 2

    Ctrl + O, save the file

    Ctrl + X, close nano

    To apply the changes run

    sudo netplan apply
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