After downloading files from a remote UNIX FTP server, you want to verify that you have downloaded all the files correctly. Minimal you will get information similar to \"dir /s\
If you have ssh access, use rsync instead. It is a far better data transfer app.
Grab fuse for your OS and load ftpfs. This will let you mount the remote ftp directory locally and you can use dir /s or any other application you want on it.