How to check the network card of linux

How to check the network card in Linux: 1. Use the ifconfig command, which is one of the most commonly used commands in the Linux system. It is used to check and configure the network interface; 2. Use the ip command, which is another commonly used command in the Linux system. A powerful tool for network management; 3. View the /proc/net/dev file to obtain more detailed network statistics than the ifconfig and ip commands.

#The operating environment of this article: linux6.4.3 system, Dell G3 computer.

Linux is a free and open source operating system widely used on servers and personal computers. In Linux systems, the network card is the interface device that connects the computer and the network and is responsible for data transmission. It is very important to know how to check the network card in Linux, as this can help us diagnose network problems, set up network configuration and monitor network traffic.

In Linux, there are several ways to view network card information. The three most common methods will be introduced below: using the ifconfig command, using the ip command and viewing the /proc/net/dev file.

The first method is to use the ifconfig command. ifconfig is one of the most commonly used commands in Linux systems, used to view and configure network interfaces. To view all network card information, just enter the ifconfig command in the terminal to display the detailed information of all network cards. For example, entering the command ifconfig -a will display the IP address, MAC address, subnet mask and other information of all network cards. To view information for a specific network card, simply follow the command with the name of the network card, such as ifconfig eth0. Through the ifconfig command, you can quickly learn the status and configuration information of the network card.

The second method is to use the ip command. ip is another powerful tool for network management in Linux systems. To view the information of all network cards, just enter the ip addr command to display the IP address, MAC address, device name and other information of all network cards. Similarly, to view information about a specific network card, just follow the command with the name of the network card, such as ip addr show eth0. Through the ip command, you can learn more about the configuration and status information of the network card.

The third method is to view the /proc/net/dev file. In Linux systems, a large amount of real-time information is stored in the /proc directory. The /proc/net/dev file records the status and statistical information of all network devices. To view the network card information, just open the file with a text editor. In this file, you can find the name of each network card, the number of data packets sent and received, the number of errors and other information. By viewing the /proc/net/dev file, you can obtain more detailed network statistics than the ifconfig and ip commands.

In Linux, it is very simple and convenient to view network card information. Mastering these methods can help us better understand and manage the system's network connections. Whether you are performing network troubleshooting or network configuration and monitoring, it is very important to understand the information about your network card. I hope that through the introduction of this article, readers can master the methods of viewing network card information and use them in practical applications.

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