FreePBX configure wifi from command line WPA2

I have computer that only have Wifi network. There is no RJ45 socket. I have to configure Wifi using command line. My Wifi: Authentication : WPA2-Personal Cipher : CCMP Connection mode : Profile Channel : 1 On FreePBX I have file: /etc/wpa_supplicant/wpa_supplicant.conf: ctrl_interface=/var/run/wpa_supplicant ctrl_interface_group=wheel network={ ssid="mynetworkname" psk="mypassword" } When I type command: wpa_supplicant -B -i wlan0 -c wpa_supplicant.conf -D wext and I get error: Successfully initialized wpa_supplicant Failed to open config file '/etc/wpa_supplicant.conf', error: No such file or directory Delete '/var/run/wpa_supplicant/wlan0' manually if it is not used anymore Failed to initialize control interface '/var/run/wpa_supplicant'. You may have another wpa_supplicant process already running or the file was left by an unclean termination of wpa_supplicant in which case you will need to manually remove this file before starting wpa_supplicant again.