All right Gordon, let's get this solved..
First of all
I used this page to siolve thisI had a wireless card that I inserted and ran into some of the same issues you were... Assuming you have both Ethernet and the wireless card still installed this is what you should run this first in terminal
iw dev
and it should show something similar to this (this is what mine shows) but with your wlp2s0
phy#0
Interface wlan0
ifindex 3
wdev 0x1
addr 00:12:17:66:73:91
ssid VastOne
type managed
channel 6 (2437 MHz), width: 20 MHz (no HT), center1: 2437 MHz
txpower 20.00 dBm
Next (and as long as that is there) let's run this
sudo medit /etc/network/interfaces
and add this and save it
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
allow-hotplug enp2s15
#iface enp2s15 inet dhcp
# The wifi network interface
allow-hotplug wlp2s0
iface wlp2s0 inet dhcp
wpa-ssid SKY4
wpa-psk YOURPASSWORDFORSKY4
A couple of things about this ... this setup will not let your primary network load the enp2s15 as a network but we can still see it in ceni and with network commands, this is fine.. If you ever need to go back to the ethernet, just pop back on here and I will show you how
If you have this setup just like this and you have the correct password added, you should be able to reboot into your wifi setup
I am setup and connected now on wifi doing what I just laid out for you...
let me know how it goes