Say I have the following CSV definition:

id,before\_rendition,after\_rendition,xmp\_camera\_raw,dng,published,author\_id,author\_user\_name,author\_url

Write a bash script that downloads the JPG files specified in column after\_rendition, and name it after-uuid.jpg. Download the files concurrently, but apply a rate limit of 10 files per second.
Here is a bash script that should accomplish what you described:
```bash
#!/bin/bash

# Set the rate limit to 10 files per second
RATE_LIMIT=10

# Set the CSV file path
CSV_FILE="path/to/your/csv/file.csv"

# Create a temporary directory to store the downloaded files
TMP_DIR=$(mktemp -d)

# Download the files concurrently with rate limiting
parallel --gnu --rate $RATE_LIMIT -j $RATE_LIMIT --eta "curl -s -o '$TMP_DIR/after-{#}.jpg' {}" ::: $(awk -F, '{print $2}' "$CSV_FILE")

# Move the files to their final destination with the desired naming convention
for file in "$TMP_DIR"/*.jpg; do
  uuid=$(basename "$file" | sed's/after-//; s/.jpg//')
  mv "$file" "after-$uuid.jpg"
done

# Remove the temporary directory
rm -rf "$TMP_DIR"
```
Let me explain how the script works:

1. The first section sets the rate limit to 10 files per second and specifies the path to the CSV file.
2. The script creates a temporary directory to store the downloaded files.
3. The `parallel` command is used to download the files concurrently. It takes the list of URLs from the `after_rendition` column of the CSV file (extracted using `awk`) and downloads each file using `curl`.
  Sure! Here is a bash script that should accomplish what you described:
```
#!/bin/bash

# Set the CSV file path
csv_file="path/to/your/csv/file.csv"

# Set the directory where the downloaded JPG files will be saved
download_dir="/path/to/download/directory"

# Set the rate limit for downloading files concurrently
max_downloads_per_second=10

# Iterate over each row in the CSV file
while IFS=, read -r id before_rendition after_rendition xmp_camera_raw dng published author_id author_user_name author_url; do
  # Check if the after_rendition value is a JPG file
  if [ "$after_rendition" = "jpg" ]; then
    # Download the JPG file
    curl -sL "https://your-image-server.com/image/${id}.jpg" -o "/${download_dir}/${id}.jpg"

    # Check if the download rate is within the limit
    if [ $(curl -sL "https://your-image-server.com/image/${id}.jpg" -w "%{transfer-rate}") -ge $max_downloads_per_second ]; then
      # Wait for a few seconds