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<TITLE>The Answer Guy 34:
Telnet/xterm: Log to file
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<H4>"Linux Gazette...<I>making Linux just a little more fun!</I>"
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<H4 align="center">By James T. Dennis,
<a href="mailto:linux-questions-only@ssc.com">linux-questions-only@ssc.com</a>
<BR>Starshine Technical Services, <A HREF="http://www.starshine.org/">http://www.starshine.org/</A>
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<H3><img src="../../gx/dennis/qbub.gif" alt="(?)"
width="50" height="28" align="left" border="0"
>Telnet/xterm: Log to file</H3>
<p><strong>From Jason Joyce on 07 Oct 1998 </strong></p>
<!-- begin body -->
<p><strong>How can you log a telnet session using it from an xterm in Linux? I
need to create a log of my actions during a telnet session, and I know
that you can do it using telnet under Microsoft. And I know that if
those guys have it, then they must have copied it from somewhere, and so
I believe that it is possible using Linux, but I can't find any way.
</strong></p>
<p><strong>Thanks for any help,
Jason
</strong></p>
<blockquote><IMG SRC="../../gx/dennis/bbub.gif" ALT="(!)" height="28" width="50" align="bottom">You can run the '<TT>script</TT>' command (which creates a
"transcript" named "typescript" by default.
</blockquote>
<blockquote>You can also run the '<TT>screen</TT>' utility, which, among
many other features, allows you to take open multiple
screen sessions through one virtual console, telnet,
xterm, or even dial-up VT100 sessions and dumb
terminals. Think of having all the power of your
virtual consoles from any sort of terminal/shell
session. You can do screen snapshots, open and close
log files, view a backscroll buffer (with '<TT>vi</TT>' like
search features), mark and paste text (keyboard driven),
do a screen lock, and even detach the whole screen
session from your current terminal, xterm or whatever
(and re-attach to it from any login, from that or any
other terminal, later).
</blockquote>
<blockquote>I routinely run '<TT>screen</TT>' for all my sessions. When I
log into one of my ISP shell accounts I prefer to
run '<TT>screen</TT>' at the far end because it will auto-detach
if my modem disconnects me. So, I can redial, re-attach
and resume my work. I can also dial into my home
system, do a '<tt>kill -HUP</tt>' on my screen process (actually
a '<tt>screen -d -R</tt>' will auto located, HUP, and re-attach
all at once) and continue working on all ten of the
interactive programs that I had running at the time.
</blockquote>
<blockquote>There are other ways you can do this. There was a
sample script in '<TT>expect</TT>' that did this in about 10
lines of TCL/expect code.
</blockquote>
<blockquote>You can also use Kermit (<a href="http://www.columbia.edu/kermit/">ckermit</a>, from Columbia
University). This is a communications package,
file transfer package and network client. I wrote
an article for <a href="http://www.samag.com/">SysAdmin Magazine</a> about a year ago
to describe its use as a telent/rlogin client.
</blockquote>
<blockquote>In addition to be fully scriptable and supporting
the same file transfers over TCP/IP as it does over
any serial connection; it's also possible to do
logging and exentisive debugging using Kermit.
</blockquote>
<blockquote>The next version (currently still in beta?) should
support Kerberos authentication <EM>and</EM> encryption
(one of several enhancements that I beat up on Frank
de la Cruz --- it's principal author and co-ordinator
--- about while researching my article).
</blockquote>
<blockquote>So, there's about four options off the top of my head.
</blockquote>
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<H5 align="center"><a href="http://www.linuxgazette.com/copying.html"
>Copyright ©</a> 1998, James T. Dennis <BR>
Published in <I>Linux Gazette</I> Issue 34 November 1998</H5>
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