From [cybercity.biz](https://www.cyberciti.biz/faq/howto-linux-renew-dhcp-client-ip-address/)

## Linux renew ip command using dhcp
```warning Warning
Releasing your IP address always brings down your network interface (NIC) and WiFi. So be careful with remote systems. Do not run these commands over ssh command-based session.
```

The `-r` flag explicitly releases the current lease, and once the lease has been released, the client exits. For example, open terminal application and type the command:
```bash
sudo dhclient -r
```
Now obtain fresh IP address using DHCP on Linux:
```bash
sudo dhclient
```