if you need to see FTP users log, and what they do on your system, just do the following commands ( this article doesn’t useful for past commands, it will be useful to get commands in the future after you do these steps):
Go to admin panel > Users > Your Profile > About Yourself > Biographical Info > Fill is text area > and click: Update Profile button. note:only for admin OR click here(..or for "user ID : 1")