i have an wireless card "Intel Corporation Wireless-AC 9260 (rev 29)",
and I tried to add wifi throught netwok->interface
after chossing right hardware, and input the right ssid, wpa password, an interface named wlp2s0 appeared.
but it is not connected to the right wlan.
when i use " ifup wlp2s0", the output like this "ifup: unknown interface wlp2s0"
i checked /etc directory and found wpa_supplicant.conf that contain right info about ssid and password.
ip link show wlp2s0 to check the status of the interface, the output like this:
wlp2s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DORMANT group default qlen 1000
it sound like that the adapter doesn't UP, and "ip link set wlp2s0 up" has no use.
any suggestions or help?