https://wiki.openvz.org/index.php?action=history&feed=atom&title=Man%2Fvznnc.8 Man/vznnc.8 - Revision history 2026-06-14T00:46:25Z Revision history for this page on the wiki MediaWiki 1.31.1 https://wiki.openvz.org/index.php?title=Man/vznnc.8&diff=16276&oldid=prev Botinki Kira: Automated import of articles 2015-04-23T18:23:27Z <p>Automated import of articles</p> <p><b>New page</b></p><div>== NAME ==<br /> <br /> &lt;p style=&quot;margin-left:11%; margin-top: 1em&quot;&gt;vznnc &amp;minus;<br /> run a program connected to a socket&lt;/p&gt;<br /> <br /> == SYNOPSIS ==<br /> <br /> &lt;table width=&quot;100%&quot; border=&quot;0&quot; rules=&quot;none&quot; frame=&quot;void&quot;<br /> cellspacing=&quot;0&quot; cellpadding=&quot;0&quot;&gt;<br /> &lt;tr valign=&quot;top&quot; align=&quot;left&quot;&gt;<br /> &lt;td width=&quot;11%&quot;&gt;&lt;/td&gt;<br /> &lt;td width=&quot;7%&quot;&gt;<br /> <br /> &lt;p style=&quot;margin-top: 1em&quot;&gt;&lt;b&gt;vznnc&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;<br /> &lt;td width=&quot;2%&quot;&gt;&lt;/td&gt;<br /> &lt;td width=&quot;77%&quot;&gt;<br /> <br /> &lt;p style=&quot;margin-top: 1em&quot;&gt;{ &lt;b&gt;-l&lt;/b&gt; | &lt;b&gt;-c&lt;/b&gt; }<br /> &lt;b&gt;-p&lt;/b&gt; &lt;i&gt;port&lt;/i&gt; [&lt;b&gt;-f&amp;nbsp;&lt;/b&gt;&lt;i&gt;fd&lt;/i&gt;] [&lt;b&gt;--&lt;/b&gt;]<br /> &lt;i&gt;program&lt;/i&gt; [&lt;i&gt;arg ...&lt;/i&gt;]&lt;/p&gt;&lt;/td&gt;<br /> &lt;td width=&quot;3%&quot;&gt;<br /> &lt;/td&gt;&lt;/tr&gt;<br /> &lt;/table&gt;<br /> <br /> == DESCRIPTION ==<br /> <br /> &lt;p style=&quot;margin-left:11%; margin-top: 1em&quot;&gt;This<br /> &amp;quot;nano-netcat&amp;quot; utility can be used to either listen<br /> on or connect to a TCP port at localhost, and run a<br /> specified &lt;i&gt;program&lt;/i&gt; with its stdin and stdout (or a<br /> specified file descriptor) connected to the socket.&lt;/p&gt;<br /> <br /> == OPTIONS ==<br /> <br /> &lt;table width=&quot;100%&quot; border=&quot;0&quot; rules=&quot;none&quot; frame=&quot;void&quot;<br /> cellspacing=&quot;0&quot; cellpadding=&quot;0&quot;&gt;<br /> &lt;tr valign=&quot;top&quot; align=&quot;left&quot;&gt;<br /> &lt;td width=&quot;11%&quot;&gt;&lt;/td&gt;<br /> &lt;td width=&quot;3%&quot;&gt;<br /> <br /> &lt;p style=&quot;margin-top: 1em&quot;&gt;&lt;b&gt;-l&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;<br /> &lt;td width=&quot;8%&quot;&gt;&lt;/td&gt;<br /> &lt;td width=&quot;69%&quot;&gt;<br /> <br /> &lt;p style=&quot;margin-top: 1em&quot;&gt;Listen on a specified TCP port<br /> at localhost.&lt;/p&gt;&lt;/td&gt;<br /> &lt;td width=&quot;9%&quot;&gt;<br /> &lt;/td&gt;&lt;/tr&gt;<br /> &lt;tr valign=&quot;top&quot; align=&quot;left&quot;&gt;<br /> &lt;td width=&quot;11%&quot;&gt;&lt;/td&gt;<br /> &lt;td width=&quot;3%&quot;&gt;<br /> <br /> &lt;p&gt;&lt;b&gt;-c&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;<br /> &lt;td width=&quot;8%&quot;&gt;&lt;/td&gt;<br /> &lt;td width=&quot;69%&quot;&gt;<br /> <br /> &lt;p&gt;Connect to a specified TCP port at localhost.&lt;/p&gt;&lt;/td&gt;<br /> &lt;td width=&quot;9%&quot;&gt;<br /> &lt;/td&gt;&lt;/tr&gt;<br /> &lt;/table&gt;<br /> <br /> &lt;p style=&quot;margin-left:11%;&quot;&gt;&lt;b&gt;-p&lt;/b&gt; &lt;i&gt;port&lt;/i&gt;&lt;/p&gt;<br /> <br /> &lt;p style=&quot;margin-left:22%;&quot;&gt;Port number.&lt;/p&gt;<br /> <br /> &lt;table width=&quot;100%&quot; border=&quot;0&quot; rules=&quot;none&quot; frame=&quot;void&quot;<br /> cellspacing=&quot;0&quot; cellpadding=&quot;0&quot;&gt;<br /> &lt;tr valign=&quot;top&quot; align=&quot;left&quot;&gt;<br /> &lt;td width=&quot;11%&quot;&gt;&lt;/td&gt;<br /> &lt;td width=&quot;7%&quot;&gt;<br /> <br /> &lt;p&gt;&lt;b&gt;-f&lt;/b&gt; &lt;i&gt;fd&lt;/i&gt;&lt;/p&gt;&lt;/td&gt;<br /> &lt;td width=&quot;4%&quot;&gt;&lt;/td&gt;<br /> &lt;td width=&quot;78%&quot;&gt;<br /> <br /> &lt;p&gt;File descriptor ID. If this option is not set, stdin and<br /> stdout are closed and are connected to the socket, otherwise<br /> they are left intact, and the specified &lt;i&gt;fd&lt;/i&gt; is<br /> used.&lt;/p&gt; &lt;/td&gt;&lt;/tr&gt;<br /> &lt;tr valign=&quot;top&quot; align=&quot;left&quot;&gt;<br /> &lt;td width=&quot;11%&quot;&gt;&lt;/td&gt;<br /> &lt;td width=&quot;7%&quot;&gt;<br /> <br /> &lt;p&gt;&lt;b&gt;--&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;<br /> &lt;td width=&quot;4%&quot;&gt;&lt;/td&gt;<br /> &lt;td width=&quot;78%&quot;&gt;<br /> <br /> &lt;p&gt;This is a separator between &lt;b&gt;vznnc&lt;/b&gt; own arguments<br /> and &lt;i&gt;program&lt;/i&gt; arguments, so that latter won&amp;rsquo;t be<br /> processed by &lt;b&gt;vznnc&lt;/b&gt;. It is required in case there are<br /> any arguments to &lt;i&gt;program&lt;/i&gt; that start with the dash<br /> (&lt;b&gt;-&lt;/b&gt;) character, and is optional otherwise.&lt;/p&gt;&lt;/td&gt;&lt;/tr&gt;<br /> &lt;/table&gt;<br /> <br /> &lt;p style=&quot;margin-left:11%;&quot;&gt;&lt;i&gt;program&lt;/i&gt; [ &lt;i&gt;arg ...&lt;/i&gt;<br /> ]&lt;/p&gt;<br /> <br /> &lt;p style=&quot;margin-left:22%;&quot;&gt;Program to run, with optional<br /> arguments.&lt;/p&gt;<br /> <br /> == EXIT STATUS ==<br /> <br /> &lt;p style=&quot;margin-left:11%; margin-top: 1em&quot;&gt;Returns<br /> &lt;i&gt;program&lt;/i&gt; exit status upon success, or one of the<br /> following codes in case of an error:&lt;/p&gt;<br /> <br /> &lt;table width=&quot;100%&quot; border=&quot;0&quot; rules=&quot;none&quot; frame=&quot;void&quot;<br /> cellspacing=&quot;0&quot; cellpadding=&quot;0&quot;&gt;<br /> &lt;tr valign=&quot;top&quot; align=&quot;left&quot;&gt;<br /> &lt;td width=&quot;11%&quot;&gt;&lt;/td&gt;<br /> &lt;td width=&quot;4%&quot;&gt;<br /> <br /> &lt;p&gt;1&lt;/p&gt;&lt;/td&gt;<br /> &lt;td width=&quot;7%&quot;&gt;&lt;/td&gt;<br /> &lt;td width=&quot;36%&quot;&gt;<br /> <br /> &lt;p&gt;Invalid usage&lt;/p&gt;&lt;/td&gt;<br /> &lt;td width=&quot;42%&quot;&gt;<br /> &lt;/td&gt;&lt;/tr&gt;<br /> &lt;tr valign=&quot;top&quot; align=&quot;left&quot;&gt;<br /> &lt;td width=&quot;11%&quot;&gt;&lt;/td&gt;<br /> &lt;td width=&quot;4%&quot;&gt;<br /> <br /> &lt;p&gt;127&lt;/p&gt;&lt;/td&gt;<br /> &lt;td width=&quot;7%&quot;&gt;&lt;/td&gt;<br /> &lt;td width=&quot;36%&quot;&gt;<br /> <br /> &lt;p&gt;Error executing &lt;i&gt;program&lt;/i&gt;.&lt;/p&gt;&lt;/td&gt;<br /> &lt;td width=&quot;42%&quot;&gt;<br /> &lt;/td&gt;&lt;/tr&gt;<br /> &lt;tr valign=&quot;top&quot; align=&quot;left&quot;&gt;<br /> &lt;td width=&quot;11%&quot;&gt;&lt;/td&gt;<br /> &lt;td width=&quot;4%&quot;&gt;<br /> <br /> &lt;p&gt;220&lt;/p&gt;&lt;/td&gt;<br /> &lt;td width=&quot;7%&quot;&gt;&lt;/td&gt;<br /> &lt;td width=&quot;36%&quot;&gt;<br /> <br /> &lt;p&gt;Network-related error.&lt;/p&gt;&lt;/td&gt;<br /> &lt;td width=&quot;42%&quot;&gt;<br /> &lt;/td&gt;&lt;/tr&gt;<br /> &lt;/table&gt;<br /> <br /> == EXAMPLES ==<br /> <br /> &lt;p style=&quot;margin-left:11%; margin-top: 1em&quot;&gt;To run<br /> receiving side of &lt;b&gt;ploop copy&lt;/b&gt; command on a remote<br /> server, using openssh port forwarding:&lt;/p&gt;<br /> <br /> &lt;pre style=&quot;margin-left:11%; margin-top: 1em&quot;&gt; PORT=2345<br /> ssh -L localhost:$PORT:localhost:$PORT $REMOTE_SERVER \<br /> vznnc -l -p $PORT -- ploop copy -d $FILE -i0 -o1&lt;/pre&gt;<br /> <br /> &lt;p style=&quot;margin-left:11%; margin-top: 1em&quot;&gt;To do the same,<br /> but with stdin and stdout intact, using file descriptor 5<br /> for communication:&lt;/p&gt;<br /> <br /> &lt;pre style=&quot;margin-left:11%; margin-top: 1em&quot;&gt; ssh -L localhost:$PORT:localhost:$PORT $REMOTE_SERVER \<br /> vznnc -l -p $PORT -f 5 -- ploop copy -d $FILE -i5 -o5&lt;/pre&gt;<br /> <br /> == SEE ALSO ==<br /> <br /> &lt;p style=&quot;margin-left:11%; margin-top: 1em&quot;&gt;&lt;b&gt;nc&lt;/b&gt;(3),<br /> &lt;b&gt;netcat&lt;/b&gt;(3), &lt;b&gt;socat&lt;/b&gt;(2).&lt;/p&gt;<br /> <br /> == LICENSE ==<br /> <br /> &lt;p style=&quot;margin-left:11%; margin-top: 1em&quot;&gt;Copyright (C)<br /> 2014, Parallels, Inc. Licensed under GNU GPL v2.&lt;/p&gt;</div> Botinki Kira