shutdown linux when amdgpu reaches junction temperature

shutdown.sh

#!/bin/sh
maxTemp="+64"

while true; do
    currTemp=$(sensors | awk '/junction/ {print $2}' | cut -d"." -f1)
    
    if [[ $currTemp > $maxTemp ]]; then
        shutdown now
	echo "too high"
    fi
    
    echo $currTemp
    sleep 5
    clear
done