Linux下如何查询网卡信息（linux查网卡）

在Linux系统中使用ifconfig查询网卡信息是十分常见的用法。在Ubuntu系统中，我们可以直接使用以下命令来查询我们的网卡信息：

ifconfig -a

ifconfig会显示出所有的网络接口，比如以太网、无线网和虚拟接口，如ETH0、Wlan0等等：

eth0      Link encap:Ethernet  HWaddr 16:2e:f4:bb:d8:25  
          inet addr:168.192.0.3  Bcast:168.255.255.255  Mask:255.0.0.0
          inet6 addr: fe80::142e:f4ff:febb:d825/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:7642783 errors:0 dropped:0 overruns:0 frame:0
          TX packets:942245 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:8011375067 (8.0 GB)  TX bytes:87922074 (87.9 MB)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:164 errors:0 dropped:0 overruns:0 frame:0
          TX packets:164 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:21306 (21.3 KB)  TX bytes:21306 (21.3 KB)

另外，我们也可以使用ip命令查看网卡信息：

ip addr

结果如下：

1: lo:  mtu 16436 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0:  mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 16:2e:f4:bb:d8:25 brd ff:ff:ff:ff:ff:ff
    inet 168.192.0.3/24 brd 168.255.255.255 scope global eth0
    inet6 fe80::142e:f4ff:febb:d825/64 scope link 
       valid_lft forever preferred_lft forever
3: wlan0:  mtu 1500 qdisc noop state DOWN qlen 1000
    link/ether 60:03:08:d1:d7:1f brd ff:ff:ff:ff:ff:ff

此外，我们还可以在终端中运行如下命令查看网卡信息：

dmesg | grep eth

结果如下：

[    0.000000] e1000: eth0: (PCI Express:2.5GT/s:Width x1) 16:2e:f4:bb:d8:25
[    0.000000] e1000: eth0: Intel(R) 82573V Gigabit Ethernet Controller
[    0.000000] e1000: eth0: MAC: 12, PHY: 12, PBA No: 02001f-0ff
[    0.000000] NET: Registered protocol family 10
[    0.000000] e1000: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx
[    0.000000] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[  422.422420] e1000: eth0: Reset adapter

总之，通过以上几个命令，我们可以方便地查询Linux系统中的网卡信息，以了解系统网络设置情况。