FTP
File Transfer Protocol - a protocol to send and receive files between to computers. The send puts file into the server that gets it.
File Transfer Protocol serves only for the purpose of Transfer of files. Even though it looks the same as HTTP but the working is entirely different. Today's FTP servers on linux run vsftpd daemon which stands for very secure FTP daemon. You cannot login as root onto an FTP server for security purposes.
Under the Linux platform the main configuration file is /etc/vsftpd/vsftpd.conf which is the top level configuration file and the same directory contains the list of ftp users. New users can be added to that file.
