Show public IP and other info from simple bash script or alias

myip.bash

#!/bin/bash
printf "Gateway:\n"; route | grep "^default" | cut -d " " -f 10
# captures ipv4 loopback/lo and primary lan interface, normally - adjust as needed:
printf "Private:\n"; ip -4 -o ad | grep "brd "| cut -d " " -f 7
# You do not need dig/nslookup for this to work (no dnsutils packages needed):
printf "Public:\n"; host -4 -t a myip.opendns.com resolver1.opendns.com | grep "myip.opendns.com has"| cut -d " " -f 4
# Instructions:
# Put this file in your path. (It does not need the ".bash" file extension.)
# Set permissions (example): `chmod 755 ~/scripts/myip`
# Run it.

output_example.txt

Gateway:
192.168.1.1
Private:
192.168.1.101/24
Public:
199.199.199.199

Instructions:

Copy the script to somewhere in your path and make it executable.

cp ./myip.bash ~/myip && chmod 750 ~/myip

Then simply run it by typing 'myip' on the command line from any directory.