Check new coming FTP file into directory and send mail

Icinga 2
1

Hello,
What are the possibilities / config for checking ftp files coming and sent a warning mail when new files reaching specific directory (i.e : /error dir) ?

Thanks

2

I would use inotify(7) - Linux manual page for this.

Antony.

3

Thanks for answer, but i am too new to grab this explanation.

In clear how could I configure a file.conf into icinga to set up ?
thanks