#!/bin/bash

case $1 in
    model)
        echo $(grep -oP 'Revision\s*:\s*\K[^ ]*' /proc/cpuinfo)
        ;;
    serial)
        echo $(grep -oP 'Serial\s*:\s*\K[^ ]*' /proc/cpuinfo)
        ;;
    *)
        echo "Usage: $0 {model|serial}"
        exit 1
esac