Raspberry Pi

Config

Edit /boot/config.txt

display_rotate=0
display_rotate=1 # 90 degress
display_rotate=2 # 180 degrees
display_rotate=3 # 270 degrees

Enable SSH by placing a file named "ssh" onto the boot partition of the SD card.

touch /path/to/sd/card/volume/ssh

sudo nano /etc/wpa_supplicant/wpa_supplicant.conf
network={
    ssid="WiFi"
    psk="WiFiPassword"
}
sudo wpa_cli reconfigure

eventually reboot and/or try this:

sudo ifconfig wlan0 down
sudo ifconfig wlan0 up
sudo ifconfig wlan0 | grep inet
sudo service networking restart

Test Config:

wpa_supplicant -i wlan0 -D wext -c /etc/wpa_supplicant/wpa_supplicant.conf -d

Find Pi with an ARP scan filtering for known Pi MAC Addresses

From windows:

arp -a | findstr b8-27-eb

From linux

arp-scan --localnet --interface=eth0 | grep b8:27:eb
arp-scan --localnet --interface=wlan0 | grep b8:27:eb