File monitoring

Hi,
I use Volumio - and this is a great player, but I will use my RPI a little wider. I control via IR the equipment and e.g. home air conditioning. I encountered some problems not related directly to Volumio, but to solve them I need a tool like “auditd”. From what I read it is not supported by the kernel.
Is there any other that allows you to monitor files and changes occurring in them?