首先给出查看网卡速度的命令
dmesg |grep eth0（查看eth0的网卡信息）
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dmesg |grep eth1（查看eth1的网卡信息） |
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dmesg |grep eth（查看所有网卡的信息）
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[root@ms-storage ~]#dmesg |grep eth0
divert: allocating divert_blk for eth0
eth0: Broadcom NetXtreme II BCM5709 1000Base-T (C0) PCI Express found at mem 92000000, IRQ 177, node addr 5cf3fcbaff58
bnx2: eth0: using MSI
ADDRCONF(NETDEV_UP): eth0: link is not ready
bnx2: eth0 NIC Copper Link is Up,1000 Mbpsfull duplex（千M全双工）
ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
eth0: no IPv6 routers present
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[root@ms-storage ~]#dmesg |grep eth1
divert: allocating divert_blk for eth1
eth1: Broadcom NetXtreme II BCM5709 1000Base-T (C0) PCI Express found at mem 94000000, IRQ 74, node addr 5cf3fcbaff5a
bnx2: eth1: using MSI
ADDRCONF(NETDEV_UP): eth1: link is not ready
bnx2: eth1 NIC Copper Link is Up,100 Mbpsfull duplex（百M全双工）
ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready
bnx2: eth1 NIC Copper Link is Down
bnx2: eth1 NIC Copper Link is Up, 100 Mbps full duplex
bnx2: eth1 NIC Copper Link is Down
bnx2: eth1 NIC Copper Link is Up, 100 Mbps full duplex
bnx2: eth1 NIC Copper Link is Down
bnx2: eth1 NIC Copper Link is Up, 100 Mbps full duplex
bnx2: eth1 NIC Copper Link is Down
bnx2: eth1 NIC Copper Link is Up, 100 Mbps full duplex
bnx2: eth1 NIC Copper Link is Down
eth1: no IPv6 routers present
bnx2: eth1 NIC Copper Link is Up, 100 Mbps full duplex
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Linux命令dmesg用来显示开机信息，kernel会将开机信息存储在ring buffer中。您若是开机时来不及查看信息，可利用dmesg来查看。开机信息亦保存在/var/log目录中，名称为dmesg的文件里。
应用dmesg可以得到所有设备的信息，包括CPU信息，外挂磁盘，网卡信息等。 | 
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