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#!/bin/bash sysctl="/sbin/sysctl" if [[ -z "$1" ]]; then echo echo "Ensure sysctl oid is missing." echo "Usage: " echo echo "$0 <sysctl oid>" echo exit 3 fi $sysctl $1 1>/dev/null 2>&1 if [[ $? -gt 0 ]]; then echo "SYSCTL OK: $1 missing" exit 0 fi echo "SYSCTL CRITICAL: $1 present" exit 2