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(?) The Answer Guy (!)

By James T. Dennis, tag@lists.linuxgazette.net
LinuxCare, http://www.linuxcare.com/

(?) Remote Control through Telnet

From Dirk Blennemann on Tue, 11 Jan 2000

Dear James,

I noticed your address on the Linuxcare pages and understood that your are a Linux expert.

I like to control a Linux server via Telnet. Do you have an idea where I may find information about that subject?

Thank you very much in advance!


(!) Any book on Unix will tell you how to access text mode and shell applications and utilities. Linux and UNIX basically don't distinguish among text console, serial terminal, telnet, and other forms of terminal access.
There's not much else to say on that subject. I recommend the use of ssh, SSL telnet or other secure variants of the client/server package to protect you from sniffing (which is a big problem for traditional telnet) and spoofing (which is the bane of rsh and rlogin).
It is also possible to remotely execute graphical applications. You run any X server on a system at hand (in front of you), and you can run X Windows programs on other hosts (clients) by exporting the DISPLAY environment variable on the remote shell.

[ As long as the client running the app can remotely access the I/O server on port 6000 or so. -- Heather ]

ssh will allow this very easily and securely. It can automatically export the appropriate variable/value to your remote host and will encrypt all the X lib protocol traffic through its own tunnel.
This is a rather big topic, but any books on Linux and UNIX should cover it in great detail.

Copyright © 2000, James T. Dennis
Published in The Linux Gazette Issue 50 February 2000
HTML transformation by Heather Stern of Starshine Technical Services, http://www.starshine.org/

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