##---- cache hostnames of hostfile---------------
if [ -n "${HOSTFILE}" ] && [ -f ${HOSTFILE} ]; then
hostnames=$(cat ${HOSTFILE} | tr '\n\r' ' ')
##---- cache hostnames of hostfile---------------
if [ -n "${HOSTFILE}" ] && [ -f ${HOSTFILE} ]; then
hostnames=$(cat ${HOSTFILE} | tr '\n\r' ' ')