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I have two Linux boxes. One is running KNOPPIX and the other Ubuntu. I have only one wifi dongle between them, and only one of them has an Ethernet port. They both have free USB ports however. I need the box with the dongle to share the connection through a male-to-male USB cable.

I know it is possible to do a similar setup with a desktop and certain portable devices, but I need it between two normal computers. I cannot buy any additional hardware.

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USB doesn't work that way and can't be used to network 2 computers directly. Your best bet is to find an USB/Ethernet adapter, or another Wi-Fi dongle. –  Renan Aug 29 '13 at 17:04
    
I am already doing this on a window System.Sharing Internet of PC via USB to a my mobile. now m looking for a way to do the same on my linux box. –  Gagan Jul 16 at 4:05
    
@Gagan Your smartphone can act as both a host and device (USB OTG), your laptop doesn't. It's easier to insert an Ethernet cable in between. –  Lekensteyn Jul 16 at 8:10

3 Answers 3

up vote 2 down vote accepted

Without any deeper knowledge, I would suggest looking at the Linux USB Project, section USB Host-to-Host Cables, and possibly Easy Transfer Cable (although that seems to be mainly a Windows thingy). In any case you are likely to need additional hardware, because the cable probably is not "just wires".

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This is impossible, unfortunately. All USB connections must be between a host device (e.g. a computer) and a normal USB device (mouse, etc.). Desktops and laptops are always hosts and therefore cannot connect to each other. Some newer mobile devices implement the USB On-The-Go standard, and can switch between being hosts and normal devices, but this won't be the case for your computers.

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I was afraid of that. Thanks for your time though! –  SkylarMT Sep 1 '13 at 1:42

There is no such thing as a USB male-to-male cable, or at least, if some idiot made one it would explicitly violate the USB standard. The closest thing to it is something like a laplink cable, which is a USB device in the middle that has two male cables coming out of it. As far as I know, these use proprietary software to communicate with the device and ask it to relay to the other computer. As such, it won't work as a normal network interface in Linux.

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Well, I have a male-to-male cable. It came with a cheap digital camera stick thing, which had a full size USB port to connect to the computer. –  SkylarMT Sep 1 '13 at 1:42

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