Detach & Attach interface on a Ubuntu instance
Guide on how to detach and attach a network interface on a Ubuntu instance
Overview
If you need to change interface on a Ubuntu instance, then this is the procedure to use.
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Run the following command in the instance.
sudo cloud-init clean -
Shut down the instance
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Detach / Attach the network interface
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Start the instance
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Reassociate Floating IP with the instance