mv all files in a directory with a particular extension -- remove dashes, underscores, spaces, dots (add more if you like) and lowercase the filename

anandroidfilenameconventionconverter.sh

#!/bin/bash

ext=.png

for file in *$ext; do
  baseName=${file%$ext}
  baseNoDashes=$(echo $baseName | tr -d '_- .')
  baseLower=$(echo $baseNoDashes | tr '[:upper:]' '[:lower:]')
  fileNew=$baseLower$ext
  echo Renaming $file to $fileNew
  #mv $file $fileNew #uncomment to actually do it
done

thanks!!