Set up network

1. network setting

 (1) /etc/network/interfaces

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auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp

auto wlan0
iface wlan0 inet manual
wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf

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(2) /etc/wpa_supplicant/wpa_supplicant.conf

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network={
        ssid="mySSID"
        psk="myPASSWD"
}

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(3) restart network interface

$ sudo ifdown wlan0
$ sudo ifup wlan0

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2. useful command

(1) ifconfig

(2) iwconfig

(3) sudo dhclient

(4) route -n

ex. route add default gw 192.168.1.1

(5) /etc/init.d/networking restart

(6) sudo ifdown/ifup wlan0





REFER

https://www.raspberrypi.com.tw/2152/setting-up-wifi-with-the-command-line/

http://raspberrypi.stackexchange.com/questions/14101/connect-network-is-unreachable-on-a-working-connected-wlan0-interface


http://www.cyberciti.biz/faq/linux-setup-default-gateway-with-route-command/