Linux & UNIX in commercial appliances


 
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The Lounge What is on Your Mind? Linux & UNIX in commercial appliances
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Old 01-13-2014
Linux & UNIX in commercial appliances

Hi All,

I was wondering how come major router vendors (e.g C**CO ) use
a custom linux/unix in their appliance but do not publish this custom code.
Isn't it a disobedience to the GPL licence ?

Please share your thoughts.
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UML_SWITCH(1)						      General Commands Manual						     UML_SWITCH(1)

NAME
uml_switch -- switch daemon for user-mode Linux SYNOPSIS
uml_switch [-unix control_socket data_socket] [-hub] [-tap tun device] [-compat-v0] [-daemon] DESCRIPTION
This manual page documents briefly the uml_switch program. This manual page was written for the Debian GNU/Linux distribution because the original program does not have a manual page. uml_switch is a daemon for managing a virtual network between user-mode Linux systems, with no connection to the host system's network. It will listen for connections on a pair of UNIX domain sockets, and forward packets between clients which connect to them. OPTIONS
-unix control_socket data_socket Listen on the specified pair of sockets, instead of the defaults. -hub Act like a hub. This means that packets received will be broadcast over all virtual links. The default is to act as a switch, where packets are only sent to the link matching the destination MAC address of the packet. -tap tap device Connect the switch to a dynamically created tap device on the host -compat-v0 Specify control protocol version 0 compatibility. -daemon Run in the background as a daemon. SEE ALSO
linux(1) The UserModeLinux-HOWTO (link to URL http://user-mode-linux.sourceforge.net/UserModeLinux-HOWTO.html) AUTHOR
uml_switch was written by Jeff Dike and others. This manual page was written by Matt Zimmerman mdz@debian.org for the Debian GNU/Linux system (but may be used by others). Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts and no Back-Cover Texts. UML_SWITCH(1)