Progressos em bash

bash_progress.sh

#!/bin/bash
# from: http://stackoverflow.com/a/12500894
PROGRESS_COUNT=0
PROGRESS_TOTAL=100
PROGRESS_START=`date +%s`

while [ $PROGRESS_COUNT -lt  $PROGRESS_TOTAL ]
do
  # the code
  sleep 0.5
	PROGRESS_CUR=`date +%s`
	PROGRESS_COUNT=$(( $PROGRESS_COUNT + 1 ))
	PROGRESS_RUNTIME=$(( $PROGRESS_CUR-$PROGRESS_START ))
	PROGRESS_ESTREMAIN=$(( ($PROGRESS_RUNTIME * $PROGRESS_TOTAL / $PROGRESS_COUNT)-$PROGRESS_RUNTIME ))
	printf "\rHello progress! %d.%d%% done ($PROGRESS_COUNT of $PROGRESS_TOTAL) - est. %d:%0.2d \e[K" $(( $PROGRESS_COUNT*100/$PROGRESS_TOTAL )) $(( ($PROGRESS_COUNT*1000/$PROGRESS_TOTAL)%10)) $(( $PROGRESS_ESTREMAIN/60 )) $(( $PROGRESS_ESTREMAIN%60 ))
done