2026-03-12 20:23:15

vg/network-traffic.sh

@@ -0,0 +1,127 @@
+#!/bin/sh
+
+usage(){
+echo "Usage: $0 [-i INTERFACE] [-s INTERVAL] [-c COUNT]"
+echo
+echo "-i INTERFACE"
+echo "    The interface to monitor, default is eth0."
+echo "-s INTERVAL"
+echo "    The time to wait in seconds between measurements, default is 3 seconds."
+echo "-c COUNT"
+echo "    The number of times to measure, default is 10 times."
+exit 3
+}
+
+readargs(){
+while [ "$#" -gt 0 ] ; do
+  case "$1" in
+   -i)
+    if [ "$2" ] ; then
+     interface="$2"
+     shift ; shift
+    else
+     echo "Missing a value for $1."
+     echo
+     shift
+     usage
+    fi
+   ;;
+   -s)
+    if [ "$2" ] ; then
+     sleep="$2"
+     shift ; shift
+    else
+     echo "Missing a value for $1."
+     echo
+     shift
+     usage
+    fi
+   ;;
+   -c)
+    if [ "$2" ] ; then
+     counter="$2"
+     shift ; shift
+    else
+     echo "Missing a value for $1."
+     echo
+     shift
+     usage
+    fi
+   ;;
+   *)
+    echo "Unknown option $1."
+    echo
+    shift
+    usage
+   ;;
+  esac
+done
+}
+
+checkargs(){
+if [ ! "$interface" ] ; then
+  interface="eth0"
+fi
+if [ ! "$sleep" ] ; then
+  sleep="3"
+fi
+if [ ! "$counter" ] ; then
+  counter="10"
+fi
+}
+
+printrxbytes(){
+/sbin/ifconfig "$interface" | grep "RX bytes" | cut -d: -f2 | awk '{ print $1 }'
+}
+
+printtxbytes(){
+/sbin/ifconfig "$interface" | grep "TX bytes" | cut -d: -f3 | awk '{ print $1 }'
+}
+
+bytestohumanreadable(){
+multiplier="0"
+number="$1"
+while [ "$number" -ge 1024 ] ; do
+  multiplier=$(($multiplier+1))
+  number=$(($number/1024))
+done
+case "$multiplier" in
+  1)
+   echo "$number Kb"
+  ;;
+  2)
+   echo "$number Mb"
+  ;;
+  3)
+   echo "$number Gb"
+  ;;
+  4)
+   echo "$number Tb"
+  ;;
+  *)
+   echo "$1 b"
+  ;;
+esac
+}
+  
+printresults(){
+while [ "$counter" -ge 0 ] ; do
+  counter=$(($counter - 1))
+  if [ "$rxbytes" ] ; then
+   oldrxbytes="$rxbytes"
+   oldtxbytes="$txbytes"
+  fi
+  rxbytes=$(printrxbytes)
+  txbytes=$(printtxbytes)
+  if [ "$oldrxbytes" -a "$rxbytes" -a "$oldtxbytes" -a "$txbytes" ] ; then
+   echo "RXbytes = $(bytestohumanreadable $(($rxbytes - $oldrxbytes))) TXbytes = $(bytestohumanreadable $(($txbytes - $oldtxbytes)))"
+  else
+   echo "Monitoring $interface every $sleep seconds. (RXbyte total = $(bytestohumanreadable $rxbytes) TXbytes total = $(bytestohumanreadable $txbytes))"
+  fi 
+  sleep "$sleep"
+done
+}
+
+readargs "$@"
+checkargs
+printresults