How do I check if my laptop WiFi supports 5ghz feq

I am using Ubuntu 18.04 I wanna check if my laptop supports 5ghz Freq because it is unable to search for my 5ghz freq I attached the screenshot of available channels=>Available channels

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1 Answer

You can check the channels that your wireless card supports with the terminal command:

sudo iwlist chan

Please note that setting your regulatory domain may affect the usable channels. In case yours is unset, here is the procedure:

Check yours:

sudo iw reg get

If you get 00, that is a one-size-maybe-fits-all setting. Find yours here: Then set it temporarily:

sudo iw reg set IS

Of course, substitute your country code if not Iceland. Set it permanently:

sudo nano /etc/default/crda

Change the last line to read:

REGDOMAIN=IS

Proofread carefully, save and close the text editor.

Now check again:

sudo iwlist chan

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