title: Port listen using /dev/tcp
body: <p>What is the command line to port listen using <code>/dev/tcp</code> in Linux?  I know about the <code>netcat</code> command, but I'm interested in connecting directly to <code>/dev/tcp</code>.  I have tried <code>exec 3&lt;&gt; /dev/tcp/host/port</code>, but I'm not sure of the command.  Thanks.</p>