discover local jetdirect printer IP addresses

discover-jetdirect.sh

#!/bin/sh
#
# A short script to discover HP JetDirect-enabled printers on your local network
#
# Requires: nmap, route, awk, grep
#
# On Fedora/RHEL/CentOS, you can install dependencies with:
#   sudo yum install -y nmap net-tools curl gawk
#
# (Most of these commands will most likely be already installed.)

nmap --open -n -p 9100 `route | grep default | awk -e '{print $2}'`/24 | grep "scan report" | awk -e '{print $5}'

To use this on Fedora/RHEL/CentOS, you'll want to make sure dependencies are installed, by running a command like so:

sudo yum install -y nmap net-tools curl gawk 

You most likely will have many of the commands already installed, except for nmap.

Other distributions should do something kinda similar, but with whatever applicable package management system (such as apt-get, pacman, brew, etc.).