Setting a Static IP - ajumalp/rpi-nas GitHub Wiki

1st you need to install package dhcpcd5

sudo apt-get install dhcpcd5

Use below command to check status

sudo service dhcpcd status

Edit file dhcpcd.conf to set static IP

sudo nano /etc/dhcpcd.conf

Set code as below there

interface eth0
static ip_address=192.168.0.4/24
static routers=192.168.0.1
static domain_name_servers=192.168.0.1

You need to restart your Pi now

sudo reboot