burn raspbian to sdcard

refer raspberrypi.org

start ssh service

1. create empty file ssh in sdcard boot partition.
2. create empty folder ssh in sdcard root-fs.

enable wifi connection

1. nmap scan LAN to get raspberry pi ip address.
2. ssh login to raspberry pi.
3. generate wap_supplicant config file to /etc/wpa_supplicant/wpa_supplicant.conf.
4. sudo ip link set wlan0 up
5. sudo dhcpcd wlan0
6. sudo ip link set eth0 down
7. sudo reboot