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14.11. wireless

14.11.1. rfkill - tool for enabling and disabling wireless devices

$ rfkill list all
0: phy0: Wireless LAN
	Soft blocked: no
	Hard blocked: yes
			

锁定无线设备

$ rfkill block 0

$ rfkill list 
0: phy0: Wireless LAN
	Soft blocked: yes
	Hard blocked: yes			
			

解锁无线设备

$ rfkill unblock all

$ rfkill list all
0: phy0: Wireless LAN
	Soft blocked: no
	Hard blocked: yes
			

14.11.2. iwlist - Get more detailed wireless information from a wireless interface

$ sudo iwlist wlan1 scanning |more

wlan1     Scan completed :
          Cell 01 - Address: 04:A1:51:99:0A:25
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    Quality=43/70  Signal level=-67 dBm  
                    Encryption key:on
                    ESSID:"szgw-p5"
                    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=0000000904486387
                    Extra: Last beacon: 1068ms ago
                    IE: Unknown: 0007737A67772D7035
                    IE: Unknown: 010882848B960C121824
                    IE: Unknown: 030101
                    IE: Unknown: 0706434E20010D14
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
                    IE: Unknown: 2A0100
                    IE: Unknown: 32043048606C
                    IE: Unknown: DD180050F20201018D0003A4000027A4000042435E0062322F00
                    IE: Unknown: DD1E00904C33CE111BFFFF000000000000000000000000000000000000000000
                    IE: Unknown: 2D1ACE111BFFFF000000000000000000000000000000000000000000
                    IE: Unknown: DD1A00904C34010D0A00000000000000000000000000000000000000
                    IE: Unknown: 3D16010D0A00000000000000000000000000000000000000
                    IE: Unknown: 4A0E14000A002C01C800140005001900
                    IE: Unknown: 7F0101
                    IE: Unknown: DD0900037F01010000FF7F
                    IE: Unknown: DD0A00037F04010000004000

			

搜索SSID

$ sudo iwlist wlan1 scanning | grep ESSID
                    ESSID:"product"
                    ESSID:"wifi123456"
                    ESSID:"ChinaNet-zNNs"
                    ESSID:"ChinaNet-dqar"
                    ESSID:"360WiFi-SEM"
                    ESSID:"360\xE5\x85\x8D\xE8\xB4\xB9WiFi-A5"
                    ESSID:"\xE5\x8F\x96\xE4\xB8\xAA\xE4\xBB\x80\xE4\xB9\x88\xE5\x90\x8D\xE5\xAD\x97\xE5\x91\xA2\xEF\xBC\x9F"
                    ESSID:""
                    ESSID:""			
			

14.11.3. iwconfig - configure a wireless network interface

			
$ sudo iwconfig eth1 essid <ESSID> key <PASSWORD>			
			
			

14.11.4. /proc/net/wireless

$ cat /proc/net/wireless
Inter-| sta-|   Quality        |   Discarded packets               | Missed | WE
 face | tus | link level noise |  nwid  crypt   frag  retry   misc | beacon | 22			
			

例 14.2. 命令行建立WiFi链接步骤

$ sudo rfkill unblock all
$ sudo ifconfig wlan1 up
$ sudo iwlist wlan1 scanning | grep ESSID
$ sudo iwconfig wlan1 essid Netkiller key 66535215
			

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