CentOS 系统中查看网卡信息的方法及详解

在Linux系统中，网卡是连接计算机与网络的重要设备，对于CentOS系统用户来说，了解网卡的基本信息对于网络配置、故障排查等方面具有重要意义,本文将详细介绍在CentOS系统中查看网卡信息的方法及步骤。

查看网卡基本信息

使用ifconfig命令

ifconfig命令是Linux系统中查看网卡信息最常用的命令之一,以下是通过ifconfig命令查看网卡信息的步骤：

（1）打开终端。

（2）输入ifconfig命令,按回车键。

（3）查看输出结果，其中包含了网卡名称、IP地址、子网掩码、广播地址等信息。

示例：

[root@centos ~]# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:0C:29:1A:1F:1E
          inet addr:192.168.1.100  Bcast:192.168.1.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1234567 errors:0 dropped:0 overruns:0 frame:0
          TX packets:987654 errors:0 dropped:0 overruns:0 carrier:0 collisions:0
          RX bytes:9876543210 (9.2 GB)  TX bytes:1234567890 (1.2 GB)
lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:1234567 errors:0 dropped:0 overruns:0 frame:0
          TX packets:987654 errors:0 dropped:0 overruns:0 carrier:0 collisions:0
          RX bytes:9876543210 (9.2 GB)  TX bytes:1234567890 (1.2 GB)

使用ip命令

ip命令是Linux系统中查看网卡信息的一个强大工具，它提供了比ifconfig更丰富的功能,以下是通过ip命令查看网卡信息的步骤：

（1）打开终端。

（2）输入ip addr命令,按回车键。

（3）查看输出结果，其中包含了网卡名称、IP地址、子网掩码、广播地址等信息。

示例：

[root@centos ~]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default 
    link/ether 00:0C:29:1A:1F:1E brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.100/24 brd 192.168.1.255 scope global eth0
       valid_lft 2510sec preferred_lft 2510sec
    inet6 fe80::20c:29ff:fe1a:1f1e/64 scope link 
       valid_lft forever preferred_lft forever

查看网卡详细信息

使用ethtool命令

ethtool命令可以查看网卡的详细信息，如速率、双工模式、MTU等,以下是通过ethtool命令查看网卡信息的步骤：

（1）打开终端。

（2）输入ethtool eth0命令,按回车键。

（3）查看输出结果,其中包含了网卡的详细信息。

示例：

[root@centos ~]# ethtool eth0
Supports auto-negotiation: Yes
Supports PTP Adaptation (IEEE 1588): No
Speed: 1000Mb/s
Duplex: Full
Port: Twisted Pair
 PHYAD: 0000:00:1f.0
Transmit队列长度: 100
Receive队列长度: 100

使用iw命令

iw命令是用于无线网卡的命令行工具，也可以用于查看无线网卡的详细信息,以下是通过iw命令查看网卡信息的步骤：

（1）打开终端。

（2）输入iw list命令,按回车键。

（3）查看输出结果,其中包含了无线网卡的详细信息。

示例：

[root@centos ~]# iw list
Interface: wlan0
  Supported bands: 2.4GHz
  Supported modes: 11b,11g,11n
  Channel 1 (2.412 GHz): 20 MHz, secondary 40 MHz - center frequency 2.412 GHz
  Channel 6 (2.437 GHz): 20 MHz, secondary 40 MHz - center frequency 2.437 GHz
  Channel 11 (2.462 GHz): 20 MHz, secondary 40 MHz - center frequency 2.462 GHz
  Channel 36 (2.465 GHz): 20 MHz, secondary 40 MHz - center frequency 2.465 GHz
  Channel 40 (2.465 GHz): 40 MHz - center frequency 2.465 GHz
  Channel 44 (2.465 GHz): 40 MHz - center frequency 2.465 GHz
  Channel 48 (2.475 GHz): 40 MHz - center frequency 2.475 GHz
  Channel 52 (2.475 GHz): 40 MHz - center frequency 2.475 GHz
  Channel 56 (2.475 GHz): 40 MHz - center frequency 2.475 GHz
  Channel 60 (2.475 GHz): 40 MHz - center frequency 2.475 GHz
  Channel 64 (2.475 GHz): 40 MHz - center frequency 2.475 GHz
  Channel 100 (5.180 GHz): 20 MHz, secondary 40 MHz - center frequency 5.180 GHz
  Channel 104 (5.182 GHz): 20 MHz, secondary 40 MHz - center frequency 5.182 GHz
  Channel 108 (5.184 GHz): 20 MHz, secondary 40 MHz - center frequency 5.184 GHz
  Channel 112 (5.186 GHz): 20 MHz, secondary 40 MHz - center frequency 5.186 GHz
  Channel 116 (5.188 GHz): 20 MHz, secondary 40 MHz - center frequency 5.188 GHz
  Channel 120 (5.190 GHz): 20 MHz, secondary 40 MHz - center frequency 5.190 GHz
  Channel 124 (5.192 GHz): 20 MHz, secondary 40 MHz - center frequency 5.192 GHz
  Channel 128 (5.194 GHz): 20 MHz, secondary 40 MHz - center frequency 5.194 GHz
  Channel 132 (5.196 GHz): 20 MHz, secondary 40 MHz - center frequency 5.196 GHz
  Channel 136 (5.198 GHz): 20 MHz, secondary 40 MHz - center frequency 5.198 GHz
  Channel 140 (5.200 GHz): 20 MHz, secondary 40 MHz - center frequency 5.200 GHz
  Channel 144 (5.202 GHz): 20 MHz, secondary 40 MHz - center frequency 5.202 GHz
  Channel 149 (5.207 GHz): 20 MHz, secondary 40 MHz - center frequency 5.207 GHz
  Channel 153 (5.211 GHz): 20 MHz, secondary 40 MHz - center frequency 5.211 GHz
  Channel 157 (5.215 GHz): 20 MHz, secondary 40 MHz - center frequency 5.215 GHz
  Channel 161 (5.219 GHz): 20 MHz, secondary 40 MHz - center frequency 5.219 GHz
  Channel 165 (5.223 GHz): 20 MHz, secondary 40 MHz - center frequency 5.223 GHz
  Channel 169 (5.225 GHz): 20 MHz, secondary 40 MHz - center frequency 5.225 GHz
  Channel 173 (5.227 GHz): 20 MHz, secondary 40 MHz - center frequency 5.227 GHz
  Channel 177 (5.229 GHz): 20 MHz, secondary 40 MHz - center frequency 5.229 GHz
  Channel 181 (5.231 GHz): 20 MHz, secondary 40 MHz - center frequency 5.231 GHz
  Channel 185 (5.233 GHz): 20 MHz, secondary 40 MHz - center frequency 5.233 GHz
  Channel 189 (5.235 GHz): 20 MHz, secondary 40 MHz - center frequency 5.235 GHz
  Channel 193 (5.237 GHz): 20 MHz, secondary 40 MHz - center frequency 5.237 GHz
  Channel 197 (5.239 GHz): 20 MHz, secondary 40 MHz - center frequency 5.239 GHz
  Channel 201 (5.241 GHz): 20 MHz, secondary 40 MHz - center frequency 5.241 GHz
  Channel 205 (5.243 GHz): 20 MHz, secondary 40 MHz - center frequency 5.243 GHz
  Channel 209 (5.245 GHz): 20 MHz, secondary 40 MHz - center frequency 5.245 GHz
  Channel 213 (5.247 GHz): 20 MHz, secondary 40 MHz - center frequency 5.247 GHz
  Channel 217 (5.249 GHz): 20 MHz, secondary 40 MHz - center frequency 5.249 GHz
  Channel 221 (5.251 GHz): 20 MHz, secondary 40 MHz - center frequency 5.251 GHz
  Channel 225 (5.253 GHz): 20 MHz, secondary 40 MHz - center frequency 5.253 GHz
  Channel 229 (5.255 GHz): 20 MHz, secondary 40 MHz - center frequency 5.255 GHz
  Channel 233 (5.257 GHz): 20 MHz, secondary 40 MHz - center frequency 5.257 GHz
  Channel 237 (5.259 GHz): 20 MHz, secondary 40 MHz - center frequency 5.259 GHz
  Channel 241 (5.261 GHz): 20 MHz, secondary 40 MHz - center frequency 5.261 GHz
  Channel 245 (5.263 GHz): 20 MHz, secondary 40 MHz - center frequency 5.263 GHz
  Channel 249 (5.265 GHz): 20 MHz, secondary 40 MHz - center frequency 5.265 GHz
  Channel 253 (5.267 GHz): 20 MHz, secondary 40 MHz - center frequency 5.267 GHz
  Channel 257 (5.269 GHz): 20 MHz, secondary 40 MHz - center frequency 5.269 GHz
  Channel 261 (5.271 GHz): 20 MHz, secondary 40 MHz - center frequency 5.271 GHz
  Channel 265 (5.273 GHz): 20 MHz, secondary 40 MHz - center frequency 5.273 GHz
  Channel 269 (5.275 GHz): 20 MHz, secondary 40 MHz - center frequency 5.275 GHz
  Channel 273 (5.277 GHz): 20 MHz, secondary 40 MHz - center frequency 5.277 GHz
  Channel 277 (5.279 GHz): 20 MHz, secondary 40 MHz - center frequency 5.279 GHz
  Channel 281 (5.281 GHz): 20 MHz, secondary 40 MHz - center frequency 5.281 GHz
  Channel 285 (5.283 GHz): 20 MHz, secondary 40 MHz - center frequency 5.283 GHz
  Channel 289 (5.285 GHz): 20 MHz, secondary 40 MHz - center frequency 5.285 GHz
  Channel 293 (5.287 GHz): 20 MHz, secondary 40 MHz - center frequency 5.287 GHz
  Channel 297 (5.289 GHz): 20 MHz, secondary 40 MHz - center frequency 5.289 GHz
  Channel 301 (5.291 GHz): 20 MHz, secondary 40 MHz - center frequency 5.291 GHz
  Channel 305 (5.293 GHz): 20 MHz, secondary 40 MHz - center frequency 5.293 GHz
  Channel 309 (5.295 GHz): 20 MHz, secondary 40 MHz - center frequency 5.295 GHz
  Channel 313 (5.297 GHz): 20 MHz, secondary 40 MHz - center frequency 5.297 GHz
  Channel 317 (5.299 GHz): 20 MHz, secondary 40 MHz - center frequency 5.299 GHz
  Channel 321 (5.301 GHz): 20 MHz, secondary 40 MHz - center frequency 5.301 GHz
  Channel 325 (5.303 GHz): 20 MHz, secondary 40 MHz - center frequency 5.303 GHz
  Channel 329 (5.305 GHz): 20 MHz, secondary 40 MHz - center frequency 5.305 GHz
  Channel 333 (5.307 GHz): 20 MHz, secondary 40 MHz - center frequency 5.307 GHz
  Channel 337 (5.309 GHz): 20 MHz, secondary 40 MHz - center frequency 5.309 GHz
  Channel 341 (5.311 GHz): 20 MHz, secondary 40 MHz - center frequency 5.311 GHz
  Channel 345 (5.313 GHz): 20 MHz, secondary 40 MHz - center frequency 5.313 GHz
  Channel 349 (5.315 GHz): 20 MHz, secondary 40 MHz - center frequency 5.315 GHz
  Channel 353 (5.317 GHz): 20 MHz, secondary 40 MHz - center frequency 5.317 GHz
  Channel 357 (5.319 GHz): 20 MHz, secondary 40 MHz - center frequency 5.319 GHz
  Channel 361 (5.321 GHz): 20 MHz, secondary 40 MHz - center frequency 5.321 GHz
  Channel 365 (5.323 GHz): 20 MHz, secondary 40 MHz - center frequency 5.323 GHz
  Channel 369 (5.325 GHz): 20 MHz, secondary 40 MHz - center frequency 5.325 GHz
  Channel 373 (5.327 GHz): 20 MHz, secondary 40 MHz - center frequency 5.327 GHz
  Channel 377 (5.329 GHz): 20 MHz, secondary 40 MHz - center frequency 5.329 GHz
  Channel 381 (5.331 GHz): 20 MHz, secondary 40 MHz - center frequency 5.331 GHz
  Channel 385 (5.333 GHz): 20 MHz, secondary 40 MHz - center frequency 5.333 GHz
  Channel 389 (5.335 GHz): 20 MHz, secondary 40 MHz - center frequency 5.335 GHz
  Channel 393 (5.337 GHz): 20 MHz, secondary 40 MHz - center frequency 5.337 GHz
  Channel 397 (5.339 GHz): 20 MHz, secondary 40 MHz - center frequency 5.339 GHz
  Channel 401 (5.341 GHz): 20 MHz, secondary 40 MHz - center frequency 5.341 GHz
  Channel 405 (5.343 GHz): 20 MHz, secondary 40 MHz - center frequency 5.343 GHz
  Channel 409 (5.345 GHz): 20 MHz, secondary 40 MHz - center frequency 5.345 GHz
  Channel 413 (5.347 GHz): 20 MHz, secondary 40 MHz - center frequency 5.347 GHz
  Channel 417 (5.349 GHz): 20 MHz, secondary 40 MHz - center frequency 5.349 GHz
  Channel 421 (5.351 GHz): 20 MHz, secondary 40 MHz - center frequency 5.351 GHz
  Channel 425 (5.353 GHz): 20 MHz, secondary 40 MHz - center frequency 5.353 GHz
  Channel 429 (5.355 GHz): 20 MHz, secondary 40 MHz - center frequency 5.355 GHz
  Channel 433 (5.357 GHz): 20 MHz, secondary 40 MHz - center frequency 5.357 GHz
  Channel 437 (5.359 GHz): 20 MHz, secondary 40 MHz - center frequency 5.359 GHz
  Channel 441 (5.361 GHz): 20 MHz, secondary 40 MHz - center frequency 5.361 GHz
  Channel 445 (5.363 GHz): 20 MHz, secondary 40 MHz - center frequency 5.363 GHz
  Channel 449 (5.365 GHz): 20 MHz, secondary 40 MHz - center frequency 5.365 GHz
  Channel 453 (5.367 GHz): 20 MHz, secondary 40 MHz - center frequency 5.367 GHz
  Channel 457 (5.369 GHz): 20 MHz, secondary 40 MHz - center frequency 5.369 GHz
  Channel 461 (5.371 GHz): 20 MHz, secondary 40 MHz - center frequency 5.371 GHz
  Channel 465 (5.373 GHz): 20 MHz, secondary 40 MHz - center frequency 5.373 GHz
  Channel 469 (5.375 GHz): 20 MHz, secondary 40 MHz - center frequency 5.375 GHz
  Channel 473 (5.377 GHz): 20 MHz, secondary 40 MHz - center frequency