enzotib

#!/bin/bash# filename: l-rateexport LC_ALL=Ciface="$1"if [[ -z "$iface" ]]; then  echo "Interface not specified: using eth0"  iface="eth0"fiif ! /sbin/ifconfig >/dev/null 2>/dev/null "$iface"; then  echo "Invalid interface"  exit 1fistring_repeat() {  string="$1"  times="$2"  printf "%0*d\n" "$times" 0 | sed 's/0/'"$char"'/g'}rxbytes() {  iface="$1"  /sbin/ifconfig "$iface" | awk '/RX bytes/ { split($2, a, ":"); print a[2] }'}txbytes() {  iface="$1"  /sbin/ifconfig "$iface" | awk '/TX bytes/ { split($6, a, ":"); print a[2] }'}tot_rxbytes_old="$(rxbytes "$iface")"tot_txbytes_old="$(txbytes "$iface")"sleep 1while true; do  tot_rxbytes="$(rxbytes "$iface")"  tot_txbytes="$(txbytes "$iface")"  rxrate="$(echo "scale=2; ($tot_rxbytes - $tot_rxbytes_old)/1024" | bc)"  txrate="$(echo "scale=2; ($tot_txbytes - $tot_txbytes_old)/1024" | bc)"  printf "%s\r" "$(string_repeat " " 40)"  printf " RX: %8.2f KB/s,     TX: %8.2f KB/s\r" $rxrate $txrate  tot_rxbytes_old=$tot_rxbytes  tot_txbytes_old=$tot_txbytes  sleep 1done