How can I switch between IP addresses on Ubuntu 18.4. My network card has several IP addresses. How can I, for example, change my IP address automatically every 10 seconds?

  • You may not have to do anything. You can see the valid_lft and preferred_lft count down in the output of ip address list, setting up reasonable values is the job of the mechanism that assigned the IP addresses (your router, probably).
    – anx
    Sep 15, 2021 at 13:32
  • Valid lifetime and preferred lifetime of each is forever Sep 15, 2021 at 15:24


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