Shell script to convert bytes to KB, MB, GB, PB, TB

convertbytesto.sh

#!/bin/bash

# Give numeric value, which is in bytes
# will show all possible conversions 

call_bc() {
 n1=$1
 n2=$2
 echo "scale=4; $n1/($n2)" |bc
}

nm=$1
pw=$2
pn=""

k_ilo=1024;
m_ega=$k_ilo*$k_ilo;
g_iga=$m_ega*$k_ilo;
t_era=$g_iga*$k_ilo;
p_eta=$t_era*$k_ilo;


[ -z "$nm" ] && exit

echo  "Bytes: "$nm
for i in KB MB GB TB PB; do
 case $i in
  KB) let pn=$k_ilo;;
  MB) let pn=$m_ega;;
  GB) let pn=$g_iga;;
  TB) let pn=$t_era;;
  PB) let pn=$p_eta;;
 esac
 echo -n "$i: "; call_bc $nm $pn
done