See the addendum for "short version" of this post.
I am trying to understand processes / files used in initializing WiFi. I know that wpa_suppllicant.conf is part of the process. To verify that I used raspi-confing option to implement WiFi and checked the contents of wpa_supplicant.conf file for changes. It did not change. . I went back to raspi-config and changed WiFi country, rebooted and again checked the wpa_suppllicant.conf. The country DID NOT change.
As part of my tests I changed to ubuntu MATE , unfortunately there was no option to implement WiFi, but I noticed when some other options were actually being configured I saw what appeared as terminal output in the background of the desktop.
Two questions - am I looking at correct wpa-supplicant.conf in /etc/wpa_supplicant directory ? Is there a way to actually get "verbose" output from raspi-config to see what is being implemented?
Thanks appreciate any help
OK, found "source " on git hub So how do I find it in Raspian and add "echo " to it??