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If I put the cursor over the Wi-Fi icon, it says 'No wireless interface found'.

Also, if I press Wireless & Wired Network Settings, the error saving /etc/dhcpcd.conf notification appears. the error notification

The picture below is the result of command sudo nano /etc/dhcpcd.conf. /etc/dhcpcd.conf

And the picture below is the result of command sudo nano /etc/wpa_supplicant/wpa_supplicant.conf /etc/wpa_supplicant/wpa_supplicant.conf

I don't know what's the problem. I tried all the ways to solve problems similar to mine on the Internet, but I can't solve this issue.

Thanks for reading.

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  • what is the output of mount | grep ext4 – Jaromanda X Oct 8 '20 at 5:23
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    You have obviously modified /etc/dhcpcd.conf which is presumably the cause of your problem. DO NOT paste pictures paste TEXT. NOTE there is ABSOLUTELY no point in trying to obscure private IP addresses. – Milliways Oct 8 '20 at 5:42
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    First execute these commands: sudo systemctl daemon-reload and sudo systemctl restart dhcpcd.service. Then do these commands, edit your question and paste its text output to it: ls -l /etc/dhcpcd.conf and systemctl status dhcpcd.service. Don't use screenshots as images! – Ingo Oct 8 '20 at 8:37
  • @JaromandaX the output is '/dev/mmcblk07 on / type ext4 (rw, noatime)' – Moon Oct 8 '20 at 9:25
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    @Moon you could just open this question here and sign in and edit the question on the RPi. Just copy (I think it's CTRL + SHIFT + C instead, but someone please correct me if I'm wrong) and paste into here. – Unsigned_Arduino Oct 8 '20 at 12:00
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You have obviously modified /etc/dhcpcd.conf which is presumably the cause of your problem; either the contents are corrupt or the permissions wrong.

As you have not explained what you did or shown the contents or permissions and obscured relevant details it is difficult to make any concrete suggestions.

You should restore /etc/dhcpcd.conf to its default. (It is best practice to ALWAYS make a backup copy of systems files before modifying them.)

If you can not do this, either restore from your backup or do a fresh installation - preferably NOT using NOOBS

NOOBS contains instructions for installation.

Judging from the fragments that are visible, you appear to have attempted to set a Static IP Address. This is not recommended in most cases, but if you want to How to set up Static IP Address explains alternatives and instructions on how to do it properly.

How to set up networking/WiFi is a more general guide to configuring Raspbian networking.

PS It is recommended that when editing system files you use sudoedit rather than sudo nano.

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