Q:

Change filenames in a specific folder through bash

I have a folder FOLDER1 with different files in it. 
I have several files in the folder with an extension .png 
I would like to change the filename of all the files with extension .png with a bash script. I tried to write one but I still didn't arrive to have what I want.
#!/bin/bash
# make sure you always put $f in double quotes to avoid any nasty surprises i.e. "$f"
i=0
for f in *.png
do
  echo "${i}Processing $f file..."
  i+=1;
  echo ${i}
  # rm "$f"
done

At the end of the script I would like to have all the files named like:
c-1.png
c-2.png
c-3.png 
...
...
...
Could you help me?
Thanks

A:

Sorry, I found my solution . 
This code is working perfectly.
#!/bin/bash
# make sure you always put $f in double quotes to avoid any nasty surprises i.e. "$f"
i=0
for f in *.png
do
  echo "$i Processing $f file..."
  i=$((i+1))
  mv $f "c-"$i.png
  #echo ${i}
done

