查看“WPA CLI”的源代码

检查无线网卡信息
<pre>qii@ubuntu:~$ iwconfig wlan0
wlan0     IEEE 802.11bgn  ESSID:"Ubuntu-wiki-wpa-cli"  
          Mode:Managed  Frequency:2.412 GHz  Access Point: D3:1D:3C:11:A2:A1   
          Bit Rate=11 Mb/s   Tx-Power=20 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:on
          Link Quality=58/70  Signal level=-52 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0
</pre>
重启无线网卡
<pre>sudo ifconfig wlan0 down
sudo ifconfig wlan0 up</pre>
搜索接入点
<pre>sudo iwlist wlan0 scanning</pre>
返回接入点列表，类似这样的
<pre>wlan0     Scan completed :
          Cell 01 - Address: D4:3D:1C:53:A3:A4
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    Quality=54/70  Signal level=-56 dBm  
                    Encryption key:on
                   ''' ESSID:"Ubuntu-wiki-wpa-cli"'''
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s
                    Mode:Master
                    Extra:tsf=0000002d049a7181
                    Extra: Last beacon: 232ms ago
                    IE: Unknown: 000954506C2D4D61676963
                    IE: Unknown: 010482848B96
                    IE: Unknown: 030101
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
                       Preauthentication Supported
                    IE: WPA Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
</pre>
设定要连接的接入点
<pre>sudo iwconfig wlan0 essid SSID</pre>
密码
<pre>sudo iwconfig wlan0 key s:passphrase</pre>
然后是自动获取 IP
<pre>sudo dhclient wlan0</pre>
==另见==
[[联网]]
[[Category:联网]]