Ubuntu – No internet connection after ubuntu server 20.04 install, ifconfig not available


I recently installed Ubuntu Server 20.04 LTS on my desktop, and found out there was no internet connection even though I had the LAN cable connected. ifconfig and iwconfig failed saying the corresponding packages net-tools and wireless-tools were not installed.


Here is the info requested. Please find the image here.

Best Answer

  • Networking in Ubuntu server is managed by netplan. Your file lacks the details needed to connect the ethernet properly.

    First, let's rename the file:

    sudo mv /etc/netplan/*.yaml  /etc/netplan/01-netcfg.yaml

    Now, let's change it to include the required details:

    sudo nano /etc/netplan/01-netcfg.yaml   

    Change the file to read:

      version: 2
      renderer: networkd
          dhcp4: true

    Netplan is very particular about spacing, indentation, etc. Proofread carefully twice. Save (Ctrl+o followed by Enter) and exit (Ctrl+x) the text editor. Follow with:

    sudo netplan generate
    sudo netplan apply

    You should be all set.

  • Related Question