here's what DeepSeek gave me for the following prompt: write a small bash script to check if a CSV exists and if it does rename to the filename_date.CSV and upload to hdfs, keep it simple

#!/bin/bash

# Check if filename argument is provided
if [ $# -eq 0 ]; then
    echo "Usage: $0 <csv_filename>"
    exit 1
fi

CSV_FILE="$1"

# Check if file exists
if [ ! -f "$CSV_FILE" ]; then
    echo "Error: File $CSV_FILE not found!"
    exit 1
fi

# Generate new filename with date (YYYYMMDD format)
DATE=$(date +%Y%m%d)
NEW_FILENAME="${CSV_FILE%.*}_${DATE}.csv"

# Rename the file
mv "$CSV_FILE" "$NEW_FILENAME"

# Upload to HDFS
hdfs dfs -put "$NEW_FILENAME" /path/to/hdfs/directory/

echo "Successfully processed: $NEW_FILENAME"