The command "ftp put /path/to/local_file"ftp put /path/to/local_file doesn't work with vsftpd. Try "ftp put /path/to/local_file remote_file_name"vsftpd. Try the following:
ftp put /path/to/local_file remote_file_name
You may choose any name you wish for the remote_file_nameremote_file_name, but you must specify one.