Lesson 5

Dates: 6/6/2018
Linux networking
Linux System Administration


NetworkManager

  • The NetworkManager is the network renderer that allows switching the network automatically when a system is moved or the network changes.

  • The NetworkManager is coming by default in Ubuntu 16.04 and 18.04 desktop installations. It also comes in RedHat 7, but is not enabled by default to manage network interfaces.

  • Very useful on laptops, especially with wifi settings.

  • NetworkManager is composed of two parts:
    1. A running service, network-manager
    2. A front-end, nmcli, nmtui, to modify the settings.

  • On Ubuntu 18.04, NetPlan needs to define NetworkManager as the service renderer to make NetworkManager effective. For example,
    network:
      version: 2
    #  renderer: networkd
      renderer: NetworkManager
    
    

  • The rest of the configuration is done through nmcli or nmtui or the GUI front ends.


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