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?
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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 '21 at 13:32
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Valid lifetime and preferred lifetime of each is forever – Myra Sewitz Sep 15 '21 at 15:24