Debian命令行查看当前使用的无线热点的参数

/****************************************
* Author : Samson
* Date : 01/06/2016
* Test platform:
* gcc 4.8.4
* GNU bash, 4.3.30
* Debian GNU/Linux 8.2
* **************************************/

大家都知道在Debian中可以通过ifconfig查看网络接口的状态，那么如何查看连接的无线热点的参数呢？

主要通过以下这些命令来查看和管理无线网络的接口：

iwconfig - configure a wireless network interface

iwlist - Get more detailed wireless information from a wireless interface

iwgetid - Report ESSID, NWID or AP/Cell Address of wireless network

iwpriv - configure optionals (private) parameters of a wireless network interface

iwspy - Get wireless statistics from specific nodes

具体如何使用请使用man命令进行查看；

以下就将常用的功能进行举例：

查看当前无线连接使用的信道：

~$ iwlist wlan0 channel
wlan0     13 channels in total; available frequencies :
          Channel 01 : 2.412 GHz
          Channel 02 : 2.417 GHz
          Channel 03 : 2.422 GHz
          Channel 04 : 2.427 GHz
          Channel 05 : 2.432 GHz
          Channel 06 : 2.437 GHz
          Channel 07 : 2.442 GHz
          Channel 08 : 2.447 GHz
          Channel 09 : 2.452 GHz
          Channel 10 : 2.457 GHz
          Channel 11 : 2.462 GHz
          Channel 12 : 2.467 GHz
          Channel 13 : 2.472 GHz
          Current Frequency:2.457 GHz (Channel 10)

可以看出当前使用的信道是10；

查看无线连接的总体概况：

~ $ iwconfig
eth0      no wireless extensions.

lo        no wireless extensions.

wlan0     IEEE 802.11bgn  ESSID:"yygy1"  
          Mode:Managed  Frequency:2.457 GHz  Access Point: C9:86:57:77:B2:18   
          Bit Rate=135 Mb/s   Tx-Power=16 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=70/70  Signal level=-37 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:7  Invalid misc:191   Missed beacon:0

可以查看到当前的无线连接使用的协议为802.11bgn，无线热点的名称为：yygy1  模式为managed.

查看当前的无线设备及模式：

~ $ iw dev
phy#0
    Interface wlan0
        ifindex 3
        type managed

扫描附近的热点及热点的基本信息：

~ $ iwlist wlan0 scanning
wlan0     Scan completed :
          Cell 01 - Address: C0:66:77:77:22:18
                    Channel:10
                    Frequency:2.457 GHz (Channel 10)
                    Quality=70/70  Signal level=-37 dBm  
                    Encryption key:on
                    ESSID:"yygy1"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
                              9 Mb/s; 12 Mb/s; 18 Mb/s
                    Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=0000000735a54b01
                    Extra: Last beacon: 2256ms ago
                    IE: Unknown: 00034C5331
                    IE: Unknown: 010882848B960C121824
                    IE: Unknown: 03010A
                    IE: Unknown: 2A0100
                    IE: Unknown: 32043048606C
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
                    IE: Unknown: 2D1A6F0017FFFFFF0001000000000000000000000000001FFF071800
                    IE: Unknown: 3D160A070400000000000000000000000000000000000000
                    IE: Unknown: 4A0E14000A00B400C800140005001900
                    IE: Unknown: 7F080100000000000000
                    IE: Unknown: BF0C30799B33EAFF0000EAFF0000
                    IE: Unknown: C005000000C0FF
                    IE: Unknown: DD1E00904C336E0017FFFFFF0001000000000000000000000000001FFF071800
                    IE: Unknown: DD1A00904C340A070000000000000000000000000000000000000000
                    IE: Unknown: DD06005043030000
                    IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00
          Cell 02 - Address: BC:66:99:88:88:88
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    Quality=63/70  Signal level=-47 dBm  
                    Encryption key:on
                    ESSID:"DDWifi"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
                              9 Mb/s; 12 Mb/s; 18 Mb/s
                    Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=0000015ee80f497a
                    Extra: Last beacon: 2256ms ago
                    IE: Unknown: 000944616F6C6957696669
                    IE: Unknown: 010882848B960C121824
                    IE: Unknown: 030101
                    IE: Unknown: 0706434E20010D20
                    IE: Unknown: 2A0100
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
                    IE: Unknown: 32043048606C
                    IE: Unknown: 2D1A6E101BFFFFFF0000000000000000008000000000000000000000
                    IE: Unknown: 331A6E101BFFFFFF0000000000000000008000000000000000000000
                    IE: Unknown: 3D1601050100000000000000000000000000000000000000
                    IE: Unknown: 341601050100000000000000000000000000000000000000
                    IE: WPA Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
                    IE: Unknown: DD180050F2020101050003A4000027A4000042435E0062322F00
                    IE: Unknown: DD0900037F01010000FF7F

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