install raspbian without monitor

Different from ubuntu, there is no default serial console.

Need to connect raspberry to the network through the ethernet cable.

https://hackernoon.com/raspberry-pi-headless-install-462ccabd75d0

SSH is also not enabled by default.  Need to put a file "ssh" into the boot partition of the SD card.

After reboot

Search subnet.
$ nmap -p 22 192.168.3.1/24

user: pi
pass: raspberry

Next is to enable wifi.

Something called rfkill is in the way.

u@raspberrypi:~ $ sudo rfkill list all
0: phy0: Wireless LAN
Soft blocked: yes
Hard blocked: no
1: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
u@raspberrypi:~ $ sudo rfkill unblock wifi
u@raspberrypi:~ $ sudo rfkill list all
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
1: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
u@raspberrypi:~ $ sudo ifconfig wlan0 up


The rest is the same.

Remember to enable SSH,  that ssh file only good for one time.