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                            # linux 查看 全部網卡 虛擬網卡 物理網卡

查看全部網卡

目錄?/sys/class/net/

~~~
ls /sys/class/net/
~~~

查看虛擬網卡

目錄 /sys/devices/virtual/net/

~~~
ls /sys/devices/virtual/net/
~~~

查看物理網卡

~~~
ls /sys/class/net/  | grep \-v "`ls /sys/devices/virtual/net/`"
~~~

**ifconfig** 實時查看效果


RX: 接收流量  (Receive)
TX: 發送流量  (Transmit)
計算方法： (KB = 數值/1000) (MB = 數值/100000)
退出查看： 按 ctrl+c 鍵

理解成  網卡**水龍頭**  帶寬**水量**

網卡和帶寬都會限制上傳和下載速度，
當 網卡大于帶寬時，限制以帶寬為準，當網卡小于帶寬時以網卡為準
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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