update, add monitor scripts

bin/monitor_bw.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+
+IF=$1
+if [[ -z "$IF" ]]; then
+	IF=`ls -1 /sys/class/net/ | head -1`
+fi
+RX_PREV=-1
+TX_PREV=-1
+
+echo "Listening $IF..."
+
+while [[ 1 == 1 ]] ; do
+	RX=`cat /sys/class/net/${IF}/statistics/rx_bytes`
+	TX=`cat /sys/class/net/${IF}/statistics/tx_bytes`
+	if [ ${RX_PREV} -ne -1 ] ; then
+		let BWRX=($RX-$RX_PREV)/1024/1024/3
+		let BWTX=($TX-$TX_PREV)/1024/1024/3
+		#echo "Received: $BWRX MB/s    Sent: $BWTX MB/s"
+		date=`date`
+		echo "$date:${BWRX},${BWTX}"
+	fi
+	RX_PREV=${RX}
+	TX_PREV=${TX}
+	sleep 3
+done