IHRODAN-1, Internet Help Sheet for RODAN Page 1
This sheet tells you how to use the Internet from RODAN, Syracuse University
Academic Computing Center's UNIX system. The Internet is a world-wide
cooperative network that includes NYSERNet, ARPANET, NSFnet and various
networks on Syracuse University campus.
Using RODAN's Internet capabilities, you can exchange electronic mail with
other Internet computers, transfer files between RODAN and other Internet
computers and can sign-on to and use other Internet computers interactively.
Receiving Mail
To read and discard electronic mail from the Internet (or from other RODAN
users), type inc and press RETURN. RODAN will display a line about each
message that just arrived, then will display its normal prompt, %. Then type
scan and press RETURN. RODAN will display the same thing as it does after
the inc command, but will also display similar information about any older
messages which you have received but not yet discarded. Each line displayed
starts with a number which is used to identify messages for further commands.
Then it will display the normal prompt, %. To read a particular message,
type show followed by the message's identifying number. RODAN will display
the message, but will not discard it automatically. If the message is long,
RODAN will display only a few lines, then will display a --More--(d%) (where
d represents a one- or two-digit number). If so, press the space bar to
display more of the message. When RODAN has displayed the entire message, it
will display its normal prompt, %. To discard the message, type rmm followed
its identifying number.
Example of Receiving Mail
% inc
Incorporating new mail into inbox...
2+ 05/30 To:jjdoe@rodan About your news. <<I was wandering
% scan
1 05/30 To:jjdoe@rodan Received your news yesterday.
2+ 05/30 To:jjdoe@rodan About your news. <<I was wandering
% show 1
(Message inbox:1)
Return-Path: mmroe@xanadu.sequoia.edu
Received: by rodan.acs.syr.edu (5.54/Academic-Computing-Services)
id AA16523; Tue, 30 May 89 12:00:36 EDT
Message-Id: <8905301600.AA16523@xanadu.sequoia.edu>
To: jjdoe@rodan.acs.syr.edu
Date: Tue, 30 May 89 12:00:34 -0500
From: Mary Roe <mmroe@xanadu.sequoia.edu>
Subject: Received your news yesterday.
I was very surprised.
% rmm 1
%
Sending Mail
To send mail, type comp and press RETURN. RODAN will display To: and wait
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for input. Type the Internet electronic mail address of the recipient and
press RETURN. It will have a form like:
hubbard@xanadu.sequoia.edu
RODAN will display cc: and wait for input. You can simply press RETURN.
RODAN will display Subject: and wait for input. You can simply press
RETURN. RODAN will type a line of 8 dashes, then wait for input at the
beginning of the next line. Type your message. When you are done, press
RETURN, then type d while holding down the CTRL key. RODAN will type another
line of 8 dashes, then will type What now? Type send and press RETURN.
Rodan will return to its normal % prompt.
Example of Sending Mail
% comp
To: mmroe@xanadu.sequoia.edu
cc:
Subject:
--------
Yes, it was very good news.
I am very happy about it.
--------
What now? send
%
More on Electronic Mail
To do more with the mail commands, use the UNIX man command to read more
about these commands. RODAN has an alternate way to send and receive
electronic mail, the mail command. Use the UNIX command man mail for more
information about the mail command.
Transferring Files
To transfer files to or from a remote computer, you need to know its Internet
name and an account and password on it.
Use the FTP command with the name of the remote computer:
% ftp xanadu.sequoia.edu
The FTP program will take a little while to lookup the name of the remote
computer (e.g. xanadu.sequoia.edu) and will establish a connection with it.
computer. Then it will give you a prompt Name (cccc:uuuu): (where cccc is
the name of the remote computer and uuuu is your username on RODAN).
Next, type the username on the remote computer and press RETURN. Then RODAN
will give you the Password: prompt.
Type your password and press RETURN. It will not echo. Then RODAN will give
you the ftp> prompt. Now you are ready to transfer files using the following
commands supported by the FTP program:
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dir - prints a directory of the files on the remote computer. It takes the
name of a directory (in the syntax of the remote computer) as its sole
argument.
get - copies a file from the remote computer to RODAN. It takes two
arguments. The first is a file specification for the remote file in the
syntax of the remote computer, the second is a file specification for the
local file to be created in the syntax used by RODAN (UNIX).
put - copies a file from RODAN to the remote computer. It also takes two
arguments. The first is a file specification for the local file in the
syntax used by RODAN (UNIX) and the second is a file specification for the
remote file to be created in the syntax of the remote computer.
hash - causes a hash mark (#) to be printed after each 1024 bytes are
transferred. This lets you know how the file transfer is progressing which
is helpful when you are doing a long or a slow transfer.
binary - sets "binary mode", i.e., causes all subsequent "puts" and "gets" to
transfer files without translating each byte. Normally, bytes are
translated so that text in the file remains readable.
ascii - sets "ascii mode" (the default), i.e., nullifies the effect of the
"binary" command.
bye - exits from FTP.
Example of File Transfer
% ftp xanadu.sequoia.edu
Connected to xanadu.sequoia.edu.
220 xanadu.sequoia.edu FTP server (Unix 4.3) ready.
Name (xanadu:mmroe): planck
331 Password required for planck.
Password:
230 User planck logged in.
ftp> dir
200 PORT command successful.
150 ASCII data connection for /bin/ls (128.230.1.55,2907) (0 bytes).
drwxrwxrwx 2 0 10 512 Jun 4 12:23 life
drwxr-xr-x 9 67 137 512 May 26 16:37 death
drwxr-xr-x 2 157 137 512 May 13 1986 taxes
drwxr-xr-x 3 0 137 512 Feb 12 11:42 reincarnation
444 bytes received in 1.0 seconds (0.50 kbytes/s)
ftp> get life einstein/life.text
200 PORT command successful.
150 Opening data connection for life (ascii mode) (1380 bytes)
226 Transfer complete.
local: einstein/life.text remote: life
1380 bytes received in 3.0 seconds (0.40 kbytes/s)
ftp> bye
221 Goodbye.
%
Using a Remote Computer Interactively
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To use a remote computer, you need to know its Internet name and an account
and password on it. Use the TELNET command with the name of the remote
computer:
% telnet xanadu.sequoia.edu
The TELNET program will take a little while to lookup the name of the remote
computer (e.g. xanadu.sequoia.edu) and will establish a connection with it.
The remote computer will then give you its normal greeting and sign-on
prompt.
While TELNET maintains the connection with the remote computer, it supports
an "escape" character which you can use to direct the TELNET program to do
several different things without necessarily breaking your connection:
control-right-square-bracket (press the right-square-bracket key while
holding down the control key). A question mark (?) after this key will tell
you what TELNET can do for you at this point. One operation is to
immediately stop the session and return to RODAN.
The other way to end your TELNET session is to sign off of the remote
computer normally.
Example Interactive Session
% telnet xanadu.sequoia.edu
Trying...
Connected to xanadu.sequoia.edu.
Binary mode:off
Escape character is '^]'.
Precedence = Routine
Level = Unclassified
Compartments = None
Handling restrictions = **
TCC = ***
4.3 BSD (xanadu.sequoia.edu)
login:planck
Password:
Last login: Wed Jun 10 13:03:43 from rodan.acs.syr.edu
Welcome to xanadu, your pathway to better living
%ls
br.c cr.c
%^D
Connection closed to foreign host.
%
Problems
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With TELNET and FTP, there is always a pause after the command is typed as
the program looks up the name of the remote computer you are contacting.
There are a lot of names, so this search can take seconds. A message is
displayed, then it takes some time to establish initial contact with the
remote computer. Thus, you must wait a little while before assuming
something has gone wrong. The length of the wait depends upon the load on
RODAN and the load on the network.
If you have reached a site at one time, but cannot reach it at a later time,
the problem may well be simply network load. If the network is loaded down
too much, FTP or TELNET will refuse to connect you.
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