I want to create a dir on grex and send a file to it from my computer.  My
ProComm book says that to do this I have to do something with the receiver
(grex) to have grex ready to receive and put into my dir. How do?

24 responses total.

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If you want to transfer files through a telnet link, it is easiest to use a
Kermit protocol, rather than x- or z-modem. If you already have the file on
an internet-connected computer, you should use ftp to send it to Grex.

Thanks folks.  Boy, I'm really getting into the stuff.  And I now subscribe
to two listservers and just got a list of 4 or 5 more on urban planning and
community.  <whee!>
Chicago Taxi Willie

One more q. My "unix in a nutshell" book doesn't give me the command to
list the files in a given dir. what is?

That command is ls.  You can also do ls -l if you want to see more
information about the files.  One thing to keep in mind about uploading
from ProComm is that DOS filenames will be put in all caps in Unix. 
Unlike DOS, Unix is case sensitive.

From an Ok: prompt, the command is     !ls -al     . This lists all the files
in your home directory. If you have a subdirectory called <dir>, it would
be    !ls -al <dir>/     From the list from the first command, you can
tell from the first letter  d  in the string that looks like drwxr--r--
that the file is a directory.

Steve (#5) slipped in.

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Um, so how do I download a file from here (using MSWorks, preferably)?

nephi - Since you're telnetting in, Kermit is the safest way
to download a file.  I'm told that people have gotten Z-Modem
to work over a telnet link, personally I've never managed it.

So does MSWorks have Kermit available?  If not, there are
plenty of programs that do.

Well, my plain old windows terminal program does.  I'm really not 
sure how to download using that, though, either.  I think there was 
some discussion of how to do it in the fall Agora, but when I went 
looking for it, I couldn't find it.  

How to use kermit is in the manual for (most?) terminal programs. First,
set your terminal program to enable text or binary kermit transfer. Then,
at a unix prompt, enter "kermit" . Text is the default type, but if you
want to transfer a binary file, enter "set file type binary". Finally,
enter "rec" or "send <filename>". It will tell you to escape to your
terminal program and initiate transfer, where you will specify to receive
or send a file, and the file name. Choosing kermit setup in your terminal
program is more complicated, so - use the default settings! Good luck!

*Thank* you, Rane!

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Not all implementations of the kermit protocol are the same though.
It appears that MS Terminal can do Kermit, but it has no parameters it 
can set or change. Experimentation seems to indicate that it supports
binary transfers only.

If you want more on your PC, there is an excellent DOS version of Kermit
(MSKermit) which has all of these features. It's free from Columbia U.

Besides packet size, another feature that can speed up Kermit transfers
is "sliding windows".  I find that I usually get transfer rates close
to the maximum allowed by the connection if I set the number of
sliding windows to 4 and the packet size to 250.

For this to work, the kermits on both ends have to support sliding
windows.  Grex kermit and MSKermit both do.

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Fairly recently -- I think as of version 3.11.  They're up to 3.13 now,
or maybe 3.14.

Interesting...  Sounds like the kermit protocal is getting more like
TCP/IP.  Do any of the kermit programs support packet driver
interfaces, or is it still dedicated to serial line connections?

Kermit has definitely joined the internet age.  MS-Kermit has internal
TCP and will work with a packet driver.  Enter appropriate parameters
and issue the commands "set port tcp" and "set host foo.baz.bar" and
it becomes a telnet client to foo.baz.bar.

C-Kermit (the Kermit program used on Grex and a multitude of other Unix
boxes) gives you a choice of interfacing with an external TCP facility
or using its internal one.

C-Kermit works quite nicely as a telnet client on my linux machine,
running on top of a PPP connection to Merit.  It has an advantage over
the standard Unix telnet client:  I can do Kermit file transfers with
it and don't have to fire up a separate ftp client.  With proper choice
of packet size and sliding window settings, Kermit throughput rivals ftp
throughput.

That's interesting.  I'll have to try it sometime (I've been using the
normal Linux telnet client).

I do not know if this is the proper forum to ask, but does linux
support kerberos?  I am going to have upgrade my PC to an OS that will
support kerberized "r" applications.  (rlogin, rsh, rcp, etc...)

I still do not understand the sense of this security stuff.  You
connect to the internet to have access to the "entire internet", but
then you put up a firewall to stop anybody from getting to you.  it
just does not make sense.

Firewalls are the cheap solution to problems like NFS.  NFS depends on
such outdated notions as "trusted host" and "trusted port" for its
security, and on the internet, that's a foolish assumption indeed.

Kerberos solves some other problems, such as what to do about packet
spies, and the "network login" problem - or how to avoid typing your
password in twenty times to access services on twenty machines.  Using
kerberos allows you to transparently distribute computing services,
without having to expose users to unnecessary security risks.

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