Script to generate /etc/dhcpcd.conf for static IP on Raspbian Raspberry Pi

static_ip.sh

#!/bin/bash -e

sudo cp /etc/dhcpcd.conf /etc/dhcpcd.conf.backup

if [[ $# -ne 0 ]]; then
    cat<<EOF

Usage:
      $0
      DEV=eth0 $0

EOF
    exit 1
fi

dev=${DEV:-wlan0}

ip -4 addr show dev $dev | awk -v dev=$dev '/inet/ {ip=$2} END{print "interface "dev; print "static ip_address="ip}'
ip route | grep default | awk '{print "static routers="$3}'
awk '/nameserver/{dns=dns" "$2} END {sub(/^ */,"",dns); print "static domain_name_servers="dns}' < /etc/resolv.conf

# vim: et sw=4 ts=4 sts=4 syntax=sh