Raspberry Pi Change IP without Reboot

Overview

Sometimes you want to change your Raspberry Pi's IP without having to reboot, here's how!

So in newer versions of Raspbian and RaspberryPi OS (Jessie and above) when you make changes to:

/etc/dhcpcd.conf

The changes don't take effect upon service restart.

sudo service dhcpcd restart

Here's what you need to do:
Edit:

/etc/dhcpcd.conf

Run:

sudo service dhcpcd stop
sudo ip addr flush dev eth0
sudo service dhcpcd start

DONE!!!