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Linux Cockpit Cache Refresh Error On Ubuntu

When using Cockpit with Ubuntu some aspects appear not to work, such as attempting to refresh software updates. A Failed to refresh cache error appears.

To resolve change the network renderer to Network Manager (in place of networkd)

  1. Determine the interface configuration file used by netplan
    • Filename will be similar to 50-cloud-int.yaml or 00-install-config.yaml

        ls /etc/netplan/
    • May also need to disable cloud init

      • Notes from default Ubuntu 50-cloud-init.yaml

          # This file is generated from information provided by the datasource.  Changes
          # to it will not persist across an instance reboot.  To disable cloud-init's
          # network configuration capabilities, write a file
          # /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
          # network: {config: disabled}
  2. Using an editor of your choice edit the config yaml file
  3. Add renderer: NetworkManager to the interface configuration

                 dhcp4: true
                 optional: true
         version: 2
         renderer: NetworkManager
  4. Test and if successful apply the configuration with netplan

     sudo netplan try
  5. Validate Cockpit now works as expected