Sometimes you may want to know the product name or hardware settings of the network interface cards (NICs) attached to your Linux system. For example when you check whether a particular network device driver or a kernel module is compatible with your Ethernet adapter, you need to know its hardware specification such as NIC model/vendor (e.g., Broadcom NetXtreme, Intel I350), speed (e.g., 1GB/s, 10GB/s), link mode (e.g., full/half duplex), etc.
In this tutorial, I will describe how to find Ethernet NIC information from the command line in Linux.
The first method is to use ethtool, a command-line tool for checking or modifying PCI-based Ethernet card settings.
To install ethtool on Ubuntu or Debian:
To install ethtool on Fedora, CentOS or RedHat:
To display hardware settings of a network interface card with ethtool, run the following command. The reason for sudo access in this case is to allow ethtool to obtain wake-on-LAN settings and link status.
Settings for eth0: Supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Supports auto-negotiation: Yes Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Advertised pause frame use: No Advertised auto-negotiation: Yes Speed: 1000Mb/s Duplex: Full Port: Twisted Pair PHYAD: 1 Transceiver: internal Auto-negotiation: on MDI-X: Unknown Supports Wake-on: g Wake-on: g Link detected: yes
To find Ethernet device driver and firmware information:
driver: bnx2 version: 2.1.6 firmware-version: bc 5.2.3 NCSI 2.0.6 bus-info: 0000:03:00.0 supports-statistics: yes supports-test: yes supports-eeprom-access: yes supports-register-dump: yes
To find factory-default MAC address information:
Permanent address: 9c:8e:99:12:2d:8a
The second method is via lshw, a command-line utility for showing detailed hardware specification of a Linux machine.
To install lshw on CentOS or RedHat, first set up Repoforge repository on your system, and then run:
To install lshw on Fedora, simply run:
To show detailed vendor information of your NIC, run the following.
*-network description: Ethernet interface product: NetXtreme II BCM5709 Gigabit Ethernet vendor: Broadcom Corporation physical id: 0 bus info: pci@0000:03:00.0 logical name: eth0 version: 20 serial: d4:85:64:77:f3:54 size: 1GB/s capacity: 1GB/s width: 64 bits clock: 33MHz capabilities: pm vpd msi msix pciexpress bus_master cap_list rom ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=bnx2 driverversion=1.7.5 duplex=full firmware=5.2.3 NCSI 2.0.6 ip=192.168.10.78 latency=0 link=yes multicast=yes port=twisted pair speed=1GB/s resources: irq:16 memory:f4000000-f5ffffff memory:e6100000-e610ffff(prefetchable)
If all you need to know is the product/vendor name of your Ethernet card, you can use lspci command which displays information about PCI buses and connected PCI devices.
To install lspci on Ubuntu or Debian:
To install lspci on CentOS, Fedora or RedHat:
To find the name of Ethernet card(s) available on your system, run the following.
03:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20)
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