Shell Script – Rename Files’ Suffixes One By One

The following shell script is used to rename the files suffix at the current directory. After giving it the executable permission, we can use it like

script <oldSuffix> <newSuffix>

Code snippet:

#! /usr/bin/bash
set -e
if [ $# -lt 2 ]; then
    echo "useage: script <oldSuffix> <newSuffix>"
    exit 1
fi
oldSuffix=$1
newSuffix=$2
cmd1=$(ls)
cmd2=$(ls |sed s/${oldSuffix}/${newSuffix}/g)

array1=()
len1=0
for i in $cmd1; do
  array1[$len1]=$i
  len1=$(expr $len1 + 1)
done

array2=()
len2=0
for i in $cmd2; do
  array2[$len2]=$i
  len2=$(expr $len2 + 1)
done

for(( i=0;i<$len1;i++)); do
  if [ "${array1[$i]}" != "${array2[$i]}" ]; then
        echo ${array1[$i]}" ==> "${array2[$i]}
        mv ${array1[$i]} ${array2[$i]}
    fi
done

Result: