We can display the network connections in our  system: 

We get an interactive access to the mncli - Network Manager -command line, using the below command:

To see the setting of the ipv4 protocol of our connection "Wired 1", we use the below command:

Then we change the setting of the ipv4 protocol - ipv4.method - from "manual" to "auto" using the below command in the interactive mode: -  "auto" means a dynamic IP address -

For the changes to take effect, we bring down the network connection, then we bring it back up, as below:

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