check_cpu_mpstat.sh - A Nagios plugin for monitoring CPU usage with mpstat
Author: Salvo Maltese <salvomaltese@hotmail.com>
License: GPLv3

This plugin monitors CPU utilization statistics (user, system, iowait, idle) using `mpstat`.
It supports per-core averaging and customizable warning/critical thresholds.

Usage:
  /usr/lib64/nagios/plugins/custom/check_cpu_mpstat.sh -w 70 -c 90

Dependencies:
  - sysstat package (for mpstat)

Original base script: https://exchange.nagios.org/directory/Plugins/System-Metrics/CPU-Usage-and-Load/check_cpu-2Esh/