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Kratos
Posts: 394
Joined: Sun Apr 12, 2015 12:41 pm

Default WiFi adapter name (e.g. wlan0)

Thu Aug 24, 2017 8:57 pm

What is the wifi adapter called by default now (in Raspbian)? It doesn't seems to be wlan0 anymore, for example:

Code: Select all

sudo ifdown wlan0
returns "Ifdown: unknown interface wlan0"

Oddly ifconfig reports the dongle as wlan0.

The reason I ask this is because I am setting my pi up as a hotspot, and setting up the software requires me to know what the adapter is called.

Sorry if this is confusing.

Any ideas?
I have posted mostly with a Pi 2 running either Ubuntu MATE, or Raspbian.

pcmanbob
Posts: 6960
Joined: Fri May 31, 2013 9:28 pm
Location: Mansfield UK

Re: Default WiFi adapter name (e.g. wlan0)

Thu Aug 24, 2017 9:18 pm

Are you using raspbian stretch by any chance ?

I have seen a post saying ifdown/ifup commands don't work under stretch.

If I come across it again I will add a link here.

edit...
mentioned here viewtopic.php?f=28&t=191061
but i think there was another mention too will keep looking.

also if you read this post the next issue of stretch will be returning to old names eth0 and wlan0

viewtopic.php?f=63&t=191010&start=75 page 4 post by ShiftPlusOne
Last edited by pcmanbob on Thu Aug 24, 2017 9:56 pm, edited 1 time in total.
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User avatar
Kratos
Posts: 394
Joined: Sun Apr 12, 2015 12:41 pm

Re: Default WiFi adapter name (e.g. wlan0)

Thu Aug 24, 2017 9:26 pm

Yes, I am. I didn't think it was stretch related, or I would have posted over on the mainstream one.

If you could find it, that would be great.
I have posted mostly with a Pi 2 running either Ubuntu MATE, or Raspbian.

User avatar
Kratos
Posts: 394
Joined: Sun Apr 12, 2015 12:41 pm

Re: Default WiFi adapter name (e.g. wlan0)

Thu Aug 24, 2017 9:29 pm

https://wiki.debian.org/NetworkConfiguration

That says the name systems were dropped to weird ones like I am getting, like wlx00f60040658.
I have posted mostly with a Pi 2 running either Ubuntu MATE, or Raspbian.

pcmanbob
Posts: 6960
Joined: Fri May 31, 2013 9:28 pm
Location: Mansfield UK

Re: Default WiFi adapter name (e.g. wlan0)

Thu Aug 24, 2017 9:36 pm

Kratos wrote:
Thu Aug 24, 2017 9:29 pm
https://wiki.debian.org/NetworkConfiguration

That says the name systems were dropped to weird ones like I am getting, like wlx00f60040658.
only for eth and usb wifi devices built in wifi should still be wlan0 I believe.
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SurferTim
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Joined: Sat Sep 14, 2013 9:27 am
Location: Miramar Beach, Florida

Re: Default WiFi adapter name (e.g. wlan0)

Thu Aug 24, 2017 9:45 pm

I had a problem with that also. I don't know if this is the correct fix, but it worked for me. If this is not correct, please feel free to admonish me.

Edit /etc/network/interfaces and add this at the end:

Code: Select all

auto wlan0

allow-hotplug wlan0

iface wlan0 inet manual
   wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
edit: You can also use this if you don't want to edit the wpa_supplicant file
sudo ip link set wlan0 up
or
sudo ip link set wlan0 down
The Wifi must be turned on to do this.

ndpiparava
Posts: 1
Joined: Tue Feb 27, 2018 7:50 am

Re: Default WiFi adapter name (e.g. wlan0)

Tue Feb 27, 2018 7:54 am

use
sudo ifconfig wlan0 down
sudo ifconfig wlan0 up

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