Adding tips when editing wpa_supplicant (raspberrypi#1672)

ihatetoregister · JamesH65 · web-flow · commit 875309d2e283 · 2020-10-05T11:51:59.000+01:00
* Clarify boot directory and add a warning about newline and file extension

* Clearified newline

* Changed boot folder back

* Update headless.md

Co-authored-by: James Hughes &lt;JamesH65@users.noreply.github.com&gt;
diff --git a/configuration/wireless/headless.md b/configuration/wireless/headless.md
@@ -6,7 +6,7 @@ Once an image is created on an SD card, by inserting it into a card reader on a
 
 ## Setting up wireless networking
 
-You will need to define a `wpa_supplicant.conf` file for your particular wireless network. Put this file in the boot folder, and when the Pi first boots, it will copy that file into the correct location in the Linux root file system and use those settings to start up wireless networking.
+You will need to define a `wpa_supplicant.conf` file for your particular wireless network. Put this file in the `boot` folder, and when the Pi first boots, it will copy that file into the correct location in the Linux root file system and use those settings to start up wireless networking. Depending on the OS and editor you are creating this on, the file could have incorrect newlines or the wrong file extension so make sure you use an editor that accounts for this. Linux expects the line feed (LF) newline character. For more information, see this [Wikipedia article](https://en.wikipedia.org/wiki/Newline). 
 
 `wpa_supplicant.conf` file example:
 ```
