linux(debian)安装USB无线网卡(tp-link TL-WN725N rtl8188eu )

1: 台式机家里面不想再走线了。 于是去某东买了个USB无线网卡。tp的WN725N  USB,非常小, 和罗技的优联接收器差不多大。

2:  驱动能自己识别是不指望了，既然是usb网卡，插入USB后，那就lsusb

看到新增加了一行Realtek的  ID 0bda:8179

 root@debian:/# lsusb
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 003 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
 Bus 004 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
 Bus 003 Device 007: ID 0bda:8179 Realtek Semiconductor Corp.
 Bus 003 Device 004: ID 04d9:4545 Holtek Semiconductor, Inc.
 Bus 003 Device 005: ID 050d:0304 Belkin Components FSU304 USB 2.0 - 4 Ports Hub
 Bus 003 Device 006: ID 046d:c52b Logitech, Inc. Unifying Receiver
 Bus 003 Device 008: ID 0781:5567 SanDisk Corp. Cruzer Blade

google下了，发现是WN725N_V2 

http://wikidevi.com/wiki/TP-LINK_TL-WN725N_v2

看下芯片组是

Probable Linux driver 8188eu

3: 既然拿到了芯片组号， 那就首先去debian官网看有木有驱动的包, 找到了realtek的固件驱动

http://packages.debian.org/wheezy/firmware-realtek

不过支持的列表里面并没有8188eu， 只有8188ce, 8188cu

那就只有去realtek的官网下了, 在

http://www.realtek.com/downloads/downloadsView.aspx?Langid=1&PNid=21&PFid=48&Level=5&Conn=4&DownTypeID=3&GetDown=false

逛了一圈，还是没有发现8188eu. 无奈去github上逛逛， 发现了这个

https://github.com/lwfinger/rtl8188eu

接下来就好办多了。

记得安装好编译环境和git

 #apt-get install gcc linux-headers-`uname -r` make automake git

如果不想git， 那直接download zip file也一样的

#unzip rtl8188eu-master.zip

#cd rtl818...

#make && make install

接下来

#depmod -a

#modprobe 8188eu 

(撸主开始是modprobe rtlwifi发现还是识别不了，想了半天。。。)

接下来就查看下是否有无线网卡了

#ifconfig -a

 wlan0     Link encap:Ethernet  HWaddr 0c:88:77:22:fa:39
           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)

这个时候系统已经装好无线驱动了。用网络管理软件or /etc/network/interfaces 里面都可以配置。

注:

但是这个github更新的驱动，信号非常差，重启后信号20%，半米的距离只有2格。 5米几乎就没有了。而且会衰减下去，10秒后信号只有2%了。15秒过后就0%了，根本不能用

这里某群的群主上传了一个8188eu.deb 的包。 试过后发现信号非常稳定， 比windows下的还要强， 推荐这个

地址在csdn这里：(不要积分) 

http://download.csdn.net/detail/rainysia/6754869

安装前需要卸载掉之前安的这个github上下的驱动，

先去/lib/firmware/rtlwifi/ 删除掉rtl8188eufw.bin

然后去/lib/modules/`uname -r`/kernel/net/wireless 删除掉lib8188eu.ko  （`uname -r` 这个是你的内核版本，比如我的是3.2.0.4-amd64）

然后去删除掉挂载，先查看名字  lsmod | more 找到8188eu

然后rmmod 8188eu

这样就把之前的驱动给卸载掉了

然后安装新的deb包的8188eu驱动

dpkg -i rtl8188eu-dkms_0+git20130406_all.deb

如果提示缺少dkms，那就安一个

apt-get install dkms

 dpkg -i rtl8188eu-dkms_0+git20130406_all.deb
 Selecting previously unselected package rtl8188eu-dkms.
 (Reading database ... 172290 files and directories currently installed.)
 Unpacking rtl8188eu-dkms (from rtl8188eu-dkms_0+git20130406_all.deb) ...
 dpkg: dependency problems prevent configuration of rtl8188eu-dkms:
  rtl8188eu-dkms depends on dkms (>= 2.1.0.0); however:
   Package dkms is not installed.

 dpkg: error processing rtl8188eu-dkms (--install):
  dependency problems - leaving unconfigured
 Errors were encountered while processing:
  rtl8188eu-dkms
 root@debian:/home/softs# apt-get install dkms
 Reading package lists... Done
 Building dependency tree
 Reading state information... Done
 The following NEW packages will be installed:
   dkms
 0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
 1 not fully installed or removed.
 Need to get 77.4 kB of archives.
 After this operation, 196 kB of additional disk space will be used.
 Get:1 http://mirrors.163.com/debian/ wheezy/main dkms all 2.2.0.3-1.2 [77.4 kB]
 Fetched 77.4 kB in 0s (81.7 kB/s)
 Selecting previously unselected package dkms.
 (Reading database ... 172545 files and directories currently installed.)
 Unpacking dkms (from .../dkms_2.2.0.3-1.2_all.deb) ...
 Processing triggers for man-db ...
 Setting up dkms (2.2.0.3-1.2) ...
 Setting up rtl8188eu-dkms (0+git20130406) ...
 Loading new rtl8188eu-0+git20130406 DKMS files...
 First Installation: checking all kernels...
 Building only for 3.2.0-4-amd64
 Building initial module for 3.2.0-4-amd64
 Done.

 8188eu:
 Running module version sanity check.
  - Original module
    - No original module exists within this kernel
  - Installation
    - Installing to /lib/modules/3.2.0-4-amd64/updates/dkms/

 depmod....

 DKMS: install completed.

然后去/lib/modules/`uname -r`/updates/dkms ,发现多了一个8188eu.ko

先看看wlan0 有没有， ifconfig 发现没有 应该是还没挂上

执行depmod -a

然后insmod 8188eu.ko

再ifconfig -a 发现有了wlan0 

把网络管理切换过去，发现信号很满！ 自此，安装完了8188eu的驱动.