6.1 Mining the Net
Big Dummy's Guide to the Internet

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     Like any large community, cyberspace has its libraries, places you
can go to look up information or take out a good book.  Telnet is one of
your keys to these libraries.
     Telnet is a program that lets you use the power of the Internet to
connect you to databases, library catalogs, and other information
resources around the world.  Want to see what the weather's like in
Vermont? Check on crop conditions in Azerbaijan? Get more information
about somebody whose name you've seen online? Telnet lets you do this,
and more.
     Alas, there's a big "but!''  Unlike the phone system, Internet is not
yet universal;  not everybody can use all of its services.  Almost all
colleges and universities on the Internet provide telnet access.   So do
all of the for-fee public-access systems listed in Chapter 1. But the
Free-Net systems do not give you access to every telnet system.  And if
you are using a public-access UUCP or Usenet site, you will not have
access to telnet. The main reason for this is cost.  Connecting to the
Internet can easily cost $1,000 or more for a leased, high-speed phone
line. Some databases and file libraries can be queried by e-mail,
however; we'll show you how to do that later on. In the meantime, the
rest of this chapter assumes you are connected to a site with at least
partial Internet access.
     Most telnet sites are fairly easy to use and have online help systems.
Most also work best (and in some cases, only) with VT100 emulation. 
Let's dive right in and try one.
     At your host system's command line, type
 
          telnet access.usask.ca
 
and hit enter.  That's all you have to do to connect to a telnet site! 
In this case, you'll be connecting to a service known as Hytelnet, which
is a database of computerized library catalogs and other databases
available through telnet.  You should see something like this:
 
          Trying 128.233.3.1 ...
          Connected to access.usask.ca.
          Escape character is '^]'.
 
 
          Ultrix UNIX (access.usask.ca)
 
          login:
 
 
     Every telnet site has two addresses -- one composed of words that
are easier for people to remember; the other a numerical address better
suited for computers.  The "escape character" is good to remember.  When
all else fails, hitting your control key and the ] key at the same time
will disconnect you and return you to your host system.  At the login
prompt, type
 
        hytelnet
 
and hit enter.  You'll see something like this:
 
                            Welcome to HYTELNET
                                version 6.2 
                            ...................
                                                                              
   What is HYTELNET?         <WHATIS>     .        Up/Down arrows MOVE
   Library catalogs          <SITES1>     .        Left/Right arrows SELECT
   Other resources           <SITES2>     .        ? for HELP anytime
   Help files for catalogs   <OP000>      .               
   Catalog interfaces        <SYS000>     .        m returns here
   Internet Glossary         <GLOSSARY>   .        q quits
   Telnet tips               <TELNET>     .
   Telnet/TN3270 escape keys <ESCAPE.KEY> .
   Key-stroke commands       <HELP.TXT>   .
                                         
                                         
                          ........................
                      HYTELNET 6.2 was written by Peter Scott,
         U of Saskatchewan Libraries, Saskatoon, Sask, Canada.  1992
     Unix and VMS software by Earl Fogel, Computing Services, U of S 1992
                                                                      
      The first choice, "<WHATIS>" will be highlighted.  Use your down
and up arrows to move the cursor among the choices.  Hit enter when you
decide on one.  You'll get another menu, which in turn will bring up
text files telling you how to connect to sites and giving any special
commands or instructions you might need.  Hytelnet does have one quirk.
To move back to where you started (for example, from a sub-menu to a
main menu), hit the left-arrow key on your computer. 
     Play with the system.  You might want to turn on your computer's
screen-capture, or at the very least, get out a pen and paper. You're
bound to run across some interesting telnet services that you'll want to
try -- and you'll need their telnet "addresses.''
     As you move around Hytelnet, it may seem as if you haven't left
your host system -- telnet can work that quickly.  Occasionally, when
network loads are heavy, however, you will notice a delay between the
time you type a command or enter a request and the time the remote
service responds.
     To disconnect from Hytelnet and return to your system, hit your q
key and enter.
     Some telnet computers are set up so that you can only access them
through a specific "port."  In those cases, you'll always see a number
after their name, for example:  india.colorado.edu 13. It's important to
include that number, because otherwise, you may not get in.
     In fact, try the above address. Type
 
                telnet india.colorado.edu 13
 
and hit enter.  You should see something like this:
 
                Trying 128.138.140.44 ...
 
Followed very quickly by this:
 
               telnet india.colorado.edu 13
       
                Escape character is '^]'.
                Sun Jan 17 14:11:41 1994
                Connection closed by foreign host.
 
    
     What we want is the middle line, which tells you the exact
Mountain Standard Time, as determined by a government-run atomic clock
in Boulder, Colo.