find duplicate files by name

find_duplicates.sh

#!/usr/bin/env zsh

# Function to find duplicate files in a directory
find_duplicate_files() {
    # Create an associative array to store filenames
    declare -A filenames
    duplicate_found=false

    # Find all files in the given directory and its subdirectories
    find "$1" -type f | while IFS= read -r file; do
        # Get the filename from the path
        filename=$(basename "$file")

        # Check if the filename already exists in the array
        if [[ -n "${filenames[$filename]}" ]]; then
            # Duplicate file found
            if [[ "${filenames[$filename]}" != "DUPLICATE" ]]; then
                # Print the duplicate filenames
                echo "Duplicate file found: $filename"
                filenames[$filename]="DUPLICATE"
                duplicate_found=true
            fi
            echo "  - $file"
        else
            # Store the filename in the array
            filenames[$filename]="$file"
        fi
    done

    # Check if any duplicate files were found
    if [[ $duplicate_found = false ]]; then
        echo "No duplicate files found."
    fi
}

# Check if a directory is provided as an argument
if [[ -z "$1" ]]; then
    echo "Please provide a directory as an argument."
    exit 1
fi

# Check if the directory exists
if [[ ! -d "$1" ]]; then
    echo "Directory '$1' not found."
    exit 1
fi

# Find duplicate files in the given directory
find_duplicate_files "$1"

make it executable using chmod +x find_duplicates.sh, and run it with the desired directory as the argument:

$ ./find_duplicates.sh /path/to/directory.

This revised script utilizes the find command to search for files recursively, ensuring that duplicate files within nested directories are also identified and displayed.