loadavg

#!/bin/sh
set -euf -o pipefail

##
# Show system load average info on every system we care about.
#
# This script tries the following:
#
#   * Run `cat /proc/loadavg` which is typical on Linux, Ubuntu, etc.
#   * Run `sysctl vm.loadavg` which is typical on BSD, OSX, etc.
#   * Exit with an error
#
# This script normalizes the output to be three numbers,
# then any extra info provided by the commands.
#
#   * 1-minute load average.
#   * 5-minute load average
#   * 10-minute load avegage
#   * Any extra info, e.g. Linux provides more info
#
# Contact: Joel Parker Henderson (joel@joelparkerhenderson.com)
# License: GPL
# Updated: 2015-01-25
##

if [ -r /proc/loadavg ]; then
   cat /proc/loadavg
   exit 0
fi

if command -v sysctl >/dev/null 2>&1; then
   sysctl vm.loadavg | awk '{print $3 " " $4 " " $5}'
   exit 0
fi

exit 1