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<TITLE>The Answer Guy 37: X Windows Over a Serial Line (Null Modem)</TITLE>
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<H4>"The Linux Gazette...<I>making Linux just a little more fun!</I>"</H4>
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<H1><A NAME="answer">
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<font color="#B03060">The Answer Guy</font>
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<BR>
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<H4>By James T. Dennis,
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<a href="mailto:linux-questions-only@ssc.com">linux-questions-only@ssc.com</a><BR>
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Starshine Technical Services,
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<A HREF="http://www.starshine.org/">http://www.starshine.org/</A>
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</H4>
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<H3 align="left"><img src="../../gx/dennis/qbubble.gif"
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height="50" width="60" alt="(?) " border="0"
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>X Windows Over a Serial Line (Null Modem)</H3>
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<p><strong>From farquhar on Sun, 27 Dec 1998
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</strong></p>
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<!-- ::
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X Windows Over a Serial Line (Null Modem)
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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:: -->
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<P><STRONG><IMG SRC="../../gx/dennis/qbub.gif" ALT="(?)"
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HEIGHT="28" WIDTH="50" BORDER="0"
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>
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I'm a new Linux user and I've found your column (and The Linux Gazette)
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immensely helpful. Thanks.
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</STRONG></P>
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<P><STRONG>
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Here's a question I haven't found an answer to, however. Thanks to The
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Linux Gazette, I know it's possible to connect 386/486 PCs to a LAN
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containing newer PCs and run them as X Terminals. I also know it's
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possible to set up text-mode terminals via null-modem using getty. But
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is there any way to run an X Terminal off another PC via a null-modem
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link? (This would be great for two-node LANs like you might find in many
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homes -- a null-modem cable is much less expensive than two NICs and a
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cable to connect them.)
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</STRONG></P>
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<P><STRONG>
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Thanks.
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Dave Farquhar
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</STRONG></P>
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<BLOCKQUOTE><IMG SRC="../../gx/dennis/bbub.gif" ALT="(!)"
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HEIGHT="28" WIDTH="50" BORDER="0"
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>
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Is is certainly possible to do this. You have to run a
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PPP or SLIP (some sort of TCP/IP networking connection) over
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the serial line to do it.
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</BLOCKQUOTE>
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<BLOCKQUOTE>
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However I'll warn that X Windows on a typical 386 or 486
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--- especially over a serial line --- would be essentially
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unusable.
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</BLOCKQUOTE>
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<BLOCKQUOTE>
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Actually the quality of your video card matters a little
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more than the CPU. My 386/33 running X on a 2Mb STB
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Powergraph is more usable than an old 486DX2/66 that my
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father used to use with a cheap 1Mb or 512K VESA VLB
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video card. However, neither of them was acceptable
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--- even when running the apps remotely (the server still
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has to work locally).
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</BLOCKQUOTE>
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<BLOCKQUOTE>
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So I wouldn't do it except at the lower resolutions (640x480
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and 800x600). X is simply not tolerable at those
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resolutions. Of course MS Windows was pretty useless on
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those old boxes too.
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</BLOCKQUOTE>
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<BLOCKQUOTE>
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Anyway --- look at the PPP HOWTO and see if you can get your
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TCP/IP running over the null modem. Then running X over
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that should be just like running it over any other network
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connection.
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</BLOCKQUOTE>
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<!-- sig -->
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<!-- end 11 -->
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<P> <hr> <P>
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<H5 align="center"><a href="http://www.linuxgazette.com/copying.html"
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>Copyright ©</a> 1999, James T. Dennis
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<BR>Published in <I>The Linux Gazette</I> Issue 37 February 1999</H5>
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