I'm using a Raspberry Pi 2B running raspbian.
I recently changed the SSID on my router and I can no longer find the pi as expected..
I edited the etc/wpa_supplicant/wpa_supplicant.conf file with the new SSID.
If I run wpa_cli reconfigure after the edit, I can use the WiFi as before, everything works fine.
When I cycle power or reboot, I find that the original wpa_supplicant.conf file is back.
It seems an old copy of the file replaces the one I edited, it has the same modify date each time.
I searched for a copy of the wpa_supplicant.conf file on the Pi somewhere but I can't fine one. I also checked for a file with the same modify date as the old wpa_supplicant.conf file and didn't fine one.
I then placed (an edited) wpa_supplicant.conf file in /boot and that didn't help either, in fact, that file seems to go away after a re-boot.
I am woefully ignorant about the finer points of both Linux and the Pi so I am stuck at this point. Does anyone have a suggestion for this problem?