This article is from the Fractal FAQ, by Ermel Stepp email@example.com with numerous contributions by others.
Anonymous ftp is a method of making files available to anyone on
the Internet. In brief, if you are on a system with ftp (e.g. Unix), you
type "ftp lyapunov.ucsd.edu", or whatever system you wish to access. You
are prompted for your name and you reply "anonymous". You are prompted
for your password and you reply with your email address. You then use
ls" to list the files, "cd" to change directories, "get" to get files, an
"quit" to exit. For example, you could say "cd /pub", "ls", "get README",
and "quit"; this would get you the file "README". See the man page ftp(1)
or ask someone at your site for more information.
In this FAQ file, anonymous ftp addresses are given in the form
name.of.machine:/pub/path [188.8.131.52]. The first part "name.of.machine" is
the machine you must ftp to. If your machine cannot determine the host
from the name, you can try the numeric Internet address: "ftp 184.108.40.206". The
part after the colon: "/pub/path" is the file or directory to access once you
are connected to the remote machine.