double_file_name_fix.sh

#!/usr/bin/env bash

# Specify the directory where you want to perform the renaming
directory="."

# Move to the specified directory
cd "$directory" || exit

# Loop through all files in the directory
for file in *; do
   extension="jpg"
   # Check if the extension appears twice
   if [[ "$file" == *."$extension"."$extension" ]]; then
       # Extract the filename without the extra extension
       filename="${file%.jpg.jpg}"
       # Rename the file
       mv "$file" "$filename.$extension"
       echo "Renamed $file to $filename.$extension"
   fi
done