配置Raspberry Pi无线上网
入手Raspberry Pi有几天了，一直插根网络连到MAC上通过共享网络来连接网络，不是很方便。
网上有说可以用TP-LINK TL-WN725N迷你路由器来连接网络，便从京东上买了一个，然后悲剧的折腾开始。首先TL-WN725N在Raspberry Pi上并没有自带驱动，当然网上有解决方案，有人在drobox上提供了一个安装驱动的脚本，好吧，各种折腾后把脚本弄到了Raspberry Pi上，可惜运行失败，让我这Linux文盲很受挫，google到很多资料，找到一个大牛折腾的过程，更加迷茫了… 不过在文章结尾的时候看到一句：
年后进了一个Tenda W311MI（主控是Ralink RT5370），RPi的固件中直接提供了驱动，省了手工编译安装驱动的麻烦。
第二天我又在京东上入了一个 腾达（TENDA）W311MI 超级Mini无线USB网卡 好吧，我比较败家!
买回来插到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，真好真省事早买这个就不会学浪费之前折腾的几个小时了
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 然后我在MAC上就可以ssh远程登录了
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