How to check how many network cards there are in Linux

The method to check the number of network cards in Linux is: 1. Run the ifconfig command to view all network interfaces and related information in the current system; 2. Use the "ip addr" command to list all network interfaces in the system and its detailed information; 3. Use the "netstat -" command to view the network interface list in the system; 4. Use the "lspci | grep -i ethern" command to filter out the network card device information.

The operating system of this tutorial: Linux5.18.14 system, Dell G3 computer.

In Linux, you can use the following methods to check how many network cards there are in the system:

1. ifconfig command:

   ifconfig is a command used to configure and display network interface information. You can directly run the ifconfig command to view all network interfaces and related information in the current system, including network card names, IP addresses, MAC addresses, etc.

2. ip command:

   The ip command is a powerful network tool that can be used to configure and manage network interfaces. Use the ip addr command to list all network interfaces in the system and their detailed information, including network card name, status, IP address, etc.

3. netstat command:

   netstat is a command used to display network-related information such as network connections, routing tables, etc. You can use the netstat -i command to view the list of network interfaces in the system, including network card name, MTU (maximum transmission unit) and other information.

4. lspci command:

   The lspci command is used to list all PCI device information in the system, including network cards. You can use the lspci | grep -i ethernet command to filter out network card device information.

These commands can be run in the terminal and provide output about the number and details of the network cards in the system. According to the specific needs and scenarios, select the appropriate command to view the network card information.

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