Renew DHCP via Terminal on OS X

To force a new DHCP lease on OS X you can use the following:

sudo ipconfig set en0 BOOTP; sleep 1; sudo ipconfig set en0 DHCP

It basically tells the ethernet device to use BOOTP, which gets rid of the current IP, then tells it to use DHCP a second later, which makes it request one again.

The device, above en0, should be changed to whatever device is to be updated.

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