Linux

How can we modify the network connection via nmcli command, to use 8.8.8.8 as a DNS server?

Difficulty: unrated

Source: bregman-arie/devops-exercises by Arie Bregman

Answer

  1. Find the connection name:

    # nmcli con show
NAME         UUID                                  TYPE      DEVICE
System ens5  8126c120-a964-e959-ff98-ac4973344505  ethernet  ens5
System eth0  5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03  ethernet  --

    Here the connection name is "System ens5". Let's say we want to modify settings for this connection.

  2. Modify the connection to use 8.8.8.8 as DNS server:

    # nmcli con mod "System ens5" ipv4.dns "8.8.8.8"

  3. We need to reactivate the connection for the change to take effect:

    nmcli con up "System ens5"

  4. Verify our settings once more:

    cat /etc/resolv.conf
nmcli -f ipv4.dns con show "System ens5"