Rename file with a random filename using uuidgen

rrename.sh

#!/bin/bash

# Enable nullglob so patterns that don't match anything expand to null
shopt -s nullglob

# Check if a file name is provided as an argument
if [ -z "$1" ]; then
    echo "Error: No file specified. Please provide a file name as an argument."
    exit 1
fi

# Assign the first argument to FILE variable
FILE=$1

# Check if the file exists
if [ ! -e "$FILE" ]; then
    echo "Error: File '$FILE' does not exist."
    exit 1
fi

# Extract the base name (without extension) and all extensions of the file
BASENAME="${FILE%%.*}"
EXTENSIONS="${FILE#*.}"

# Lowercase the EXTENSIONS
EXTENSIONS=$(echo "$EXTENSIONS" | tr '[:upper:]' '[:lower:]')

# Generate a unique file name using uuidgen
NEW_FILENAME="$(uuidgen).$EXTENSIONS"

# Move the file to the new unique file name
mv -v "$FILE" "$NEW_FILENAME"