Location of wpa_supplicant.conf on Ubuntu 16.04 LTS

Question

For some reason am unable to locate wpa_supplicant.conf file on my Ubuntu PC. I am using Ubuntu 16.04 LTS. I did run a find and here's the result:

~$ sudo find / -iname wpa_supplicant.conf
[sudo] password for popo01: 
find: ‘/run/user/1000/gvfs’: Permission denied
/etc/dbus-1/system.d/wpa_supplicant.conf

The wpa_supplicant.conf located in dbus-1 is an xml file and looks something like this:

https://apt-browse.org/browse/ubuntu/trusty/main/i386/wpasupplicant/2.1-0ubuntu1/file/etc/dbus-1/system.d/wpa_supplicant.conf

This doesn't seem to be the right wpa_supplicant.conf file.

Without the wpa_supplicant.conf, anytime I need to work with wpa_cli for establishing p2p connection between peer wifi devices, I need to kill wpa_supplicant and restart it again with my own p2p.conf file. How do I make these settings permanent? I do not want to go through the process of killing and restarting wpa_supplicant every time I boot my PC.

Answer 1

man wpa_supplicant tells us:

QUICK START
       First,  make a configuration file, e.g.  /etc/wpa_supplicant.conf, that
       describes    the    networks    you    are    interested    in.     See
       wpa_supplicant.conf(5) for details.

By "make a configuration file," the author meant "create a configuration file", and by e.g. /etc/wpa_supplicant.conf he/she means "for example, call the configuration file you just created wpa_supplicant.conf".

Since there are so many WiFi cards, and so many, many WiFi network configurations, Linux doesn't give you a default WiFi configuration.

Read man wpa_supplicant.conf, and create a configuration file for your configuration. Feel free to call it wpa_supplicant.conf (or fred, it doesn't matter).