File Transfer Protocol (file transfer protocol FTP)
FTP is a file transfer protocol for the Internet, based on the server / client mode, default 20 (for data transmission), 21 (a command for control) port.
FTP divided into active mode (active server sends a link request to the client) and passive mode (server waits for a client sends a request)
vsftpd has three authentication modes, publicly anonymous, local users, virtual users
vsftpd configuration file located in / etc / vsftpd / sftpdconf
Interested in Linux have to add a collection of online learning website is https://www.linuxprobe.com/chapter-00.html
annex:
Linux introductory tutorial , https://www.linuxprobe.com/docs/LinuxProbe.pdf
Linux command Daquan : https://www.linuxcool.com/
