Hi all, I'm looking for ideas/suggestions here:

I would like to be able to download a file into one folder, then have it automatically duplicate into two other folders. I would like for this process to be running continuously, and if possible notice the downloaded file rather quickly.

Download into Folder A -- insert process or suggestion here, that will notice this file here and then automatically duplicate the file to Folder B and to Folder C.

** If possible a huge preference would be to have the files hard-linked instead of copy. But not a requirement.

Thank you for any suggestions!

Edited April 1Apr 1 by shelfactor

For anyone coming to this thread from a search, I ended up using User Scripts + INOTIFY to watch the folder and hardlink to others. I have the script set to run at startup continuously.

#!/bin/bash

WATCH_DIR="[WATCH DIRECTORY]"
DEST1="[DESTINATION FOLDER1]"
DEST2="[DESTINATION FOLDER2]"

echo "Starting hardlink watcher..."
echo "Watching: $WATCH_DIR"

inotifywait -m -r -e close_write,moved_to --format '%w%f' "$WATCH_DIR" | while read FILE
do
    # Only process files (skip directories)
    [ -f "$FILE" ] || continue

    REL_PATH="${FILE#$WATCH_DIR/}"

    DEST1_PATH="$DEST1/$REL_PATH"
    DEST2_PATH="$DEST2/$REL_PATH"

    # Create destination directories if needed
    mkdir -p "$(dirname "$DEST1_PATH")"
    mkdir -p "$(dirname "$DEST2_PATH")"

    # Create hardlinks if they don’t already exist
    if [ ! -e "$DEST1_PATH" ]; then
        ln "$FILE" "$DEST1_PATH"
        echo "Linked to calibre: $REL_PATH"
    fi

    if [ ! -e "$DEST2_PATH" ]; then
        ln "$FILE" "$DEST2_PATH"
        echo "Linked to calibreweb: $REL_PATH"
    fi

done