Splunk错误：“无法查找HOME变量”

请帮助我了解此shell脚本的作用：

# main
for HOST in ${HOSTS}
do
URI=http://${HOST}:80
count=99
result=`/opt/splunk/bin/splunk search "index=${INDEX} sourcetype=${SOURCETYPE} SPLUNK_HEALTH_CHECK |stats count" -earliest_time ${EARLIEST} -latest_time ${LATEST} -uri ${URI} -auth ${USER}:${PASS} -preview F -output csv -timeout ${TIMEOUT} 2>&1 |grep -v count |tr -d '\n' |sed 's/"//g'`
if expr $result : '[0-9]*' > /dev/null 2>&1; then

count=$result
result="OK"
fi
date +"%Y-%m-%d %T sh=${HOST} status=\"${result}\" delay_status=$count"
done