Метод 1: использование inotifywait

#!/bin/bash
file="path/to/your/file.txt"
while inotifywait -e modify "$file"; do
    # Execute your script here
    echo "File changed!"
    # Add your script execution command(s) here
done

Метод 2. Использование цикла с проверкой временных меток

#!/bin/bash
file="path/to/your/file.txt"
timestamp=$(stat -c %Y "$file")
while true; do
    current_timestamp=$(stat -c %Y "$file")
    if [[ "$current_timestamp" != "$timestamp" ]]; then
        # Execute your script here
        echo "File changed!"
        # Add your script execution command(s) here
        timestamp=$current_timestamp
    fi
    sleep 1
done

Метод 3: использование утилиты командной строки entr

#!/bin/bash
file="path/to/your/file.txt"
# Install the entr utility if not already present
# Example: sudo apt-get install entr
while true; do
    # Execute your script here
    echo "File changed!"
    # Add your script execution command(s) here
    entr -d -p -s "true" "$file"
done

Метод 4. Использование inotifywait с функцией оболочки

#!/bin/bash
file="path/to/your/file.txt"
function watch_file() {
    while inotifywait -e modify "$1"; do
        # Execute your script here
        echo "File changed!"
        # Add your script execution command(s) here
    done
}
watch_file "$file"