File Transfer Protocol (FTP)
ftp
220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------
220-You are user number 3 of 50 allowed.
220-Local time is now 22:12. Server port: 21.
220-This is a private system - No anonymous login
220-IPv6 connections are also welcome on this server.
220 You will be disconnected after 15 minutes of inactivity.
标签：number,50,user,allowed,----------,220 From： https://www.cnblogs.com/rsapaper/p/17249729.html