linux获取uplink的wifi的channel信息

雨点打透心脏的1/2处 2022-03-18 14:42 315阅读 0赞

iwlist wlan0 channel | grep 'Frequency' | awk '{print $5}' | sed 's/[()]//g'

wlan0是5G的接口

root@OpenWrt:~# iwlist wlan0 channel 
    wlan0     32 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 36 : 5.18 GHz
              Channel 40 : 5.2 GHz
              Channel 44 : 5.22 GHz
              Channel 48 : 5.24 GHz
              Channel 52 : 5.26 GHz
              Channel 56 : 5.28 GHz
              Channel 60 : 5.3 GHz
              Channel 64 : 5.32 GHz
              Channel 100 : 5.5 GHz
              Channel 104 : 5.52 GHz
              Channel 108 : 5.54 GHz
              Channel 112 : 5.56 GHz
              Channel 116 : 5.58 GHz
              Channel 120 : 5.6 GHz
              Channel 124 : 5.62 GHz
              Channel 128 : 5.64 GHz
              Channel 132 : 5.66 GHz
              Channel 136 : 5.68 GHz
              Channel 140 : 5.7 GHz
              Channel 144 : 5.72 GHz
              Channel 149 : 5.745 GHz
              Current Frequency:5.2 GHz (Channel 40)
    
    root@OpenWrt:~# iwlist wlan0 channel | grep 'Frequency'
              Current Frequency:5.2 GHz (Channel 40)
    root@OpenWrt:~# 
    root@OpenWrt:~# iwlist wlan0 channel | grep 'Frequency' | awk '{print $4}'
    (Channel
    root@OpenWrt:~# iwlist wlan0 channel | grep 'Frequency' | awk '{print $5}'
    40)
    root@OpenWrt:~# 
    root@OpenWrt:~# iwlist wlan0 channel | grep 'Frequency' | awk '{print $5}' | sed 's/[()]//g'
    40

--------------------

root@OpenWrt:~# iwinfo wlan0 info
    wlan0     ESSID: "HUAWEI-BEVAQ8_5G"
              Access Point: 50:04:B8:53:0D:FC
              Mode: Client  Channel: 48 (5.240 GHz)
              Tx-Power: 23 dBm  Link Quality: 57/70
              Signal: -53 dBm  Noise: unknown
              Bit Rate: 3083.2 MBit/s
              Encryption: unknown
              Type: nl80211  HW Mode(s): 802.11bgnac
              Hardware: 0271:0701 0000:0000 [Generic MAC80211]
              TX power offset: unknown
              Frequency offset: unknown
              Supports VAPs: yes  PHY name: phy1
    root@OpenWrt:~# 
    root@OpenWrt:~# 
    root@OpenWrt:~# iwinfo wlan0 info | grep Channel
              Mode: Client  Channel: 48 (5.240 GHz)
    root@OpenWrt:~# iwinfo wlan0 info | grep Channel | awk '{print $1}'
    Mode:
    root@OpenWrt:~# iwinfo wlan0 info | grep Channel | awk '{print $2}'
    Client
    root@OpenWrt:~# iwinfo wlan0 info | grep Channel | awk '{print $4}'
    48

--------------------

linbo@atel4gdonglesrv3-pc:~$ 
    linbo@atel4gdonglesrv3-pc:~$ grep Frequency aaa.txt 
              Current Frequency:5.2 GHz (Channel 40)
    linbo@atel4gdonglesrv3-pc:~$ 
    linbo@atel4gdonglesrv3-pc:~$ 
    linbo@atel4gdonglesrv3-pc:~$ grep Frequency aaa.txt  | awk -F'[()]' '{print $2}' 
    Channel 40
    linbo@atel4gdonglesrv3-pc:~$ grep Frequency aaa.txt  | awk -F'[()]' '{print $2}' | awk '{print $2}'
    40
    linbo@atel4gdonglesrv3-pc:~$

\[文本处理\] shell 如何删除文本中的括号  
[http://bbs.chinaunix.net/thread-4179496-1-1.html][http_bbs.chinaunix.net_thread-4179496-1-1.html]

文件  
(sdfwef)  
(q234tgbvv)  
(55th45ghb.2.33./jsdfio)  
如何把文件中的括号去除

sed 's/[()]//g' file

awk -F'[()]' '{print $2}' file

sed -r 's/.(.*)./\1/' file

tr -d '()' <urflie

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