Login Check

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This is a check to see if anyone has logged into the machine in the last 30 days. Obviously if you login to the machine and run it, it will defeat the purpose. The is meant to be ran as a cron job once a week or even every day.

DAYS=30
for (( i=0; i<=$DAYS; i++)) ;do
        unset GREP
        unset DATE
        DATE=`date +'%b %d' -d "$i day"`
        GREP=`lastlog | grep "$DATE"`
        if [[ ! -z "$GREP" ]]; then
                break
        fi

done

if [[ -z "$GREP" ]]; then
        echo "Activity within 30 Days NOT Detected"
fi

### DEBUG
#if [[ ! -z "$GREP" ]]; then
#        echo "Activity within 30 Days Detected"
#fi