Linux下获取网卡总带宽

[爱碎碎念]

想获取网卡的可用带宽,即总带宽减去已用带宽.
已用带宽可以通过读取"/proc/net/dev"文件并计算获得,可是总带宽该如何获取?
谢谢.

[forsiny]

如果你用的是有线网卡的话：
sudo ethtool eth0
eht0是自己机子上的名字

比如我的就是
Settings for eth0:
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Advertised auto-negotiation: Yes
Speed: 100Mb/s
Duplex: Full
Port: MII
PHYAD: 32
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: pumbg
Wake-on: d
Current message level: 0x00000007 (7)
Link detected: yes



如果无线网卡：
iwconfig