The unmanaged network issue occurs when on previously GUI less Debian system the GUI and the Network Manager is installed. The reason is that Network Manager has been denied access to network management.

As you will see below, the unmanaged network issue can easily be fixed by editing the main NetworkManager's configuration file /etc/NetworkManager/NetworkManager.conf.

In this tutorial you will learn:
  • How to grant access to NetworkManager to manage the systems networking
  • How to restart the NetworkManager
Unmanaged network on Debian Linux
Unmanaged network on Debian Linux

Software Requirements and Conventions Used

Software Requirements and Linux Command Line Conventions
Category Requirements, Conventions or Software Version Used
System Debian 10 GNU/Linux
Software N/A
Other Privileged access to your Linux system as root or via the sudo command.
Conventions # - requires given linux commands to be executed with root privileges either directly as a root user or by use of sudo command
$ - requires given linux commands to be executed as a regular non-privileged user

Solution to Unmanaged network issue on Debian Linux step by step instructions

Rather then seeing Unmanaged network icon as an issue it should be seen as an alternative. Not always the user might wish to give an access to manage the network to the NetworkManager.

In case you wish to manage your system network via NetworkManager this is how you can do it:
  1. Edit NetworkManager configuration file /etc/NetworkManager/NetworkManager.conf.

    Open the file with administrative privileges and change the following stanza: FROM:
    [ifupdown]
    managed=false
    
    TO:
    [ifupdown]
    managed=true
    

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  2. Restart network manager:
    # systemctl restart network-manager
    
  3. System network is now managed by the NetworkManager daemon
    Debian's system network is now managed by the NetworkManager daemon
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