setup-wifi-raspberry-pi.md

##Raspberry Pi通过命令行安装USB无线网卡

这里使用的是 腾达（TENDA）W311MI 超级Mini无线USB网卡

Raspberry Pi上启动后运行 lsusb

pi@raspberrypi:~$ lsusb
Bus 001 Device 002: ID 0424:9512 Standard Microsystems Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.
Bus 001 Device 004: ID 148f:5370 Ralink Technology, Corp. RT5370 Wireless Adapter
Bus 001 Device 005: ID 03eb:0902 Atmel Corp. 4-Port Hub
Bus 001 Device 006: ID 062a:0000 Creative Labs Optical mouse
Bus 001 Device 007: ID 413c:2003 Dell Computer Corp. Keyboard

其中Bus 001 Device 004: ID 148f:5370 Ralink Technology, Corp. RT5370 Wireless Adapter并是W311MI路由器。

运行 iwconfig

pi@raspberrypi:~$ iwconfig
wlan0     IEEE 802.11bgn  ESSID:"TP-LINK_Z"
      Mode:Managed  Frequency:2.437 GHz  Access Point: 00:27:19:78:B2:E8
      Bit Rate=54 Mb/s   Tx-Power=20 dBm
      Retry  long limit:7   RTS thr:off   Fragment thr:off
      Power Management:on
      Link Quality=43/70  Signal level=-67 dBm
      Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
      Tx excessive retries:22  Invalid misc:6   Missed beacon:0

lo        no wireless extensions.

eth0      no wireless extensions.

wlan0 就是你的无线网卡信息了

####接下来步骤：配置网络

修改/etc/network/interfaces

auto lo

iface lo inet loopback
iface eth0 inet dhcp

allow-hotplug wlan0
iface wlan0 inet manual
wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf

iface default inet dhcp

网上说可以设置静态IP，我是linux文盲，尝试了下可惜失败了:(

修改 /etc/wpa_supplicant/wpa_supplicant.conf

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1

network={
  ssid="无线名称"
  psk="无线密码"
  proto=WPA
  key_mgmt=WPA-PSK
  pairwise=TKIP
  auth_alg=OPEN
}

proto key_mgmt与pairwise的值与你无线网络的设置对应上即可

最后 sudo reboot 重启

运行ifconfig -a

@raspberrypi:~$ ifconfig -a
eth0      Link encap:Ethernet  HWaddr b8:27:eb:f8:c5:7f
      UP BROADCAST MULTICAST  MTU:1500  Metric:1
      RX packets:0 errors:0 dropped:0 overruns:0 frame:0
      TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:1000
      RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

lo        Link encap:Local Loopback
      inet addr:127.0.0.1  Mask:255.0.0.0
      UP LOOPBACK RUNNING  MTU:16436  Metric:1
      RX packets:8 errors:0 dropped:0 overruns:0 frame:0
      TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:0
      RX bytes:1104 (1.0 KiB)  TX bytes:1104 (1.0 KiB)

wlan0     Link encap:Ethernet  HWaddr c8:3a:35:c5:cc:6b
      inet addr:192.168.2.104  Bcast:255.255.255.255  Mask:255.255.255.0
      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
      RX packets:958 errors:0 dropped:0 overruns:0 frame:0
      TX packets:368 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:1000
      RX bytes:172315 (168.2 KiB)  TX bytes:47919 (46.7 KiB)

Raspberry Pi的局域网IP为 192.168.2.104 然后就可以ssh远程登录了