[PLUG] [OT ? ?? ???] Linux and computer literacy

Russell Senior russell at personaltelco.net
Tue Jun 19 13:12:11 UTC 2018


Just as an example of something remotely like what you might expect to see
in the dmesg output, here's what I see when I plug a usb-ethernet adapter
into a Ubuntu 16.04 USB 3 port:

[...]
[2793539.351788] usb 3-2: new SuperSpeed USB device number 2 using xhci_hcd
[2793539.378837] usb 3-2: New USB device found, idVendor=0b95,
idProduct=1790
[2793539.378846] usb 3-2: New USB device strings: Mfr=1, Product=2,
SerialNumber=3
[2793539.378851] usb 3-2: Product: AX88179
[2793539.378856] usb 3-2: Manufacturer: ASIX Elec. Corp.
[2793539.378861] usb 3-2: SerialNumber: 000050B61F4505
[2793540.800220] ax88179_178a 3-2:1.0 eth0: register 'ax88179_178a' at
usb-0000:00:14.0-2, ASIX AX88179 USB 3.0 Gigabit Ethernet, 00:50:b6:1f:45:05
[2793540.801218] usbcore: registered new interface driver ax88179_178a
[2793540.842186] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[2793541.169959] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready

The link is not ready because I haven't connected an ethernet cable to the
adapter, nor an active device to the other end of the ethernet cable.
Note, in my case I see the ethernet interface is named eth0. Your mileage
may vary.

On Tue, Jun 19, 2018 at 5:27 AM, Russell Senior <russell at personaltelco.net>
wrote:

> So, do you see the usbN interface or not?
>
> On Tue, Jun 19, 2018 at 5:12 AM, Richard Owlett <rowlett at cloud85.net>
> wrote:
>
>> On 06/19/2018 06:45 AM, Russell Senior wrote:
>>
>>> Here is someone 10 years ago, using debian:
>>>
>>>
>>> https://jonmccune.wordpress.com/2008/12/09/prolific-pl-25a1-
>>> usb-to-usb-bridge-in-linux/
>>>
>>
>> Now bookmarked. I read. It stated in part "... a new usbX network
>> interface (view with `ifconfig -a`)."
>> I tried and was given much - need to read up to understand what it tells
>> me.
>>
>> Then I read the rest of your post ;/
>>
>>
>>
>>> What your distribution does (even if it is still Debian) might be
>>> different
>>> today, but it looks like it creates a network interface (usbN, in this
>>> case).  Again, your mileage might vary, but the dmesg output should tell
>>> you what interface name is assigned.
>>>
>>> You could also compare the output before and after plugging in the cable
>>> of
>>> the command: ip addr
>>>
>>> For example:
>>>
>>>   ip addr > /tmp/before-plugging.txt
>>>   [plug in device]
>>>   ip addr > /tmp/after-plugging.txt
>>>   diff -u /tmp/before-plugging.txt /tmp/after-plugging.txt
>>>
>>> The difference should be the newly created network interface.
>>>
>>
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>>
>
>



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