Basics of viewing network card information in Ubuntu

Ubuntu, usually wired Nic is eth0,http://www.aliyun.com/zixun/aggregation/32544.html "> wireless network card is Wlan0, Subsequent additions and so on (some wireless network card models may be named eth1, not wlan0).

Ifconfig Introduction

Ifconfig is a tool used to view, configure, enable, or disable network interfaces, a tool that is most commonly used (that is, people who like to move commands ...). ）。

View System network card information

Ifconfig

Activate/disable NIC

Activate network card

sudo ifconfig NIC device name up

View Network card information

Ifconfig Network Card device name

Enable/disable Network

Sudo/etc/init.d/networking start

Iwconfig

For viewing wireless connections

qii@ubuntu:~$ Iwconfig
Lo no wireless extensions.

Eth0 no wireless extensions.

Wlan0 IEEE 802.11BGN Essid:off/any
mode:managed Access point:not-associated tx-power=20 dBm
Retry long limit:7 RTS thr:off Fragment Thr:off
Power Management:off

View NIC Device information

Check the NIC manufacturer, model number.

qii@ubuntu:~$ Lspci | Grep-i Net
03:00.0 Ethernet Controller:realtek Semiconductor Co., Ltd. rtl8111/8168b PCI Express Gigabit Ethernet Controller (Rev. 01)
04:00.0 Receptacle Controller:atheros Communications inc. AR9285 Wireless receptacle Adapter (pci-express) (Rev. 01)

For example, at the bottom, in this format, the first line here is Realtek's rtl8111/8168b wired network card, and the second line is the Atheros AR9285 wireless network card.

If you are a USB card

Lsusb

Modify NIC Interface name

qii@ubuntu:~$ sudo nano/etc/udev/rules.d/70-persistent-net.rules

Modify the following fields.

Name= "eth0" and Name= "Wlan0"

Then restart Ubuntu.