Linux Commands On Pi

Make Sure You are Up to Date

# remember to use >>
sudo apt-get update

sudo apt-get upgrade 

sudo raspi-config     # still works as alternative to command line 

Config Files

interfaces

#  sudo leafpad  /etc/network/interfaces

Keyboard

or just edit file

1. sudo leafpad /etc/default/keyboard

XKBLAYOUT="us"

sudo leafpad /etc/default/keyboard may be protected try with sudo no file is empty

wpa_supplicant.conf

# for info 

sudo iwlist wlan0 scan

then edit 

sudo leafpad /etc/wpa_supplicant/wpa_supplicant.conf

Go to the bottom of the file and add the following:

#  sudo leafpad /etc/wpa_supplicant/wpa_supplicant.conf
# at bottom of file
# ok to have 2

network={
    ssid="The_ESSID_from_earlier"
    psk="Your_wifi_password"

network={
    ssid="The_ESSID_from_earlier"
    psk="Your_wifi_password"
}