#!/bin/bash
# Rename all .png files in this directory to lowercase with underscores replacing spaces.

cd "$(dirname "$0")" || exit 1

for f in *.png; do
  [ -f "$f" ] || continue
  newname=$(echo "$f" | tr '[:upper:]' '[:lower:]' | tr ' ' '_')
  if [ "$f" != "$newname" ]; then
    mv "$f" "$newname"
    echo "Renamed: $f -> $newname"
  fi
done