How can I rename all file of a folder like '1.jpg' to '1 hello.jpg' with Linux command?

Question

I have thousands of pictures in a folder like this-

1.jpg

2.jpg

3.jpg

And I want to rename them all to

   1 hello.jpg

    2 hello.jpg

    3 hello.jpg

Answer 1

Try this:

#!/bin/bash

for x in [[:digit:]]*.jpg;do mv $x "${x%.jpg} hello.jpg";done

Answer 2

This script would be exactly doing what you want.

#!/usr/bin/env bash

for f in *.jpg
do
    oldName=$(basename -s.jpg $f)
    mv $f  $oldName\ hello.jpg
done