Linux List Network Interfaces

💡 Note: The nmcli command is particularly useful for systems that use NetworkManager, as it provides detailed information about network connections and their statuses.

Using the ethtool Command

The ethtool command is a utility for displaying and modifying network interface controller (NIC) settings. It is particularly useful for diagnosing network issues and configuring advanced network settings.

To Linux list network interfaces using the ethtool command, you can use the following syntax:

ethtool -i eth0

This command will display detailed information about the specified network interface, including the driver name and version. To list all network interfaces, you can use the following command:

ls /sys/class/net

This command will list all network interfaces available on the system. You can then use the ethtool command to get detailed information about each interface.

💡 Note: The ethtool command is particularly useful for diagnosing network issues and configuring advanced network settings.

Using the lshw Command

The lshw command is a utility for displaying detailed information about the hardware configuration of the system. It can be used to list network interfaces and provide detailed information about each one.

To Linux list network interfaces using the lshw command, use the following syntax:

sudo lshw -class network

This command will display detailed information about all network interfaces on the system, including the interface name, driver, and configuration settings. The output will look something like this:

In this example, the output includes detailed information about the Ethernet and wireless interfaces, including the driver name, version, and configuration settings.

💡 Note: The lshw command provides detailed information about the hardware configuration of the system, making it a useful tool for diagnosing network issues.

Using the ls Command

The ls command is a basic utility for listing directory contents. It can also be used to list network interfaces by examining the contents of the /sys/class/net directory.

To Linux list network interfaces using the ls command, use the following syntax:

ls /sys/class/net

This command will list all network interfaces available on the system. The output will look something like this:

In this example, the output includes the loopback interface lo, the Ethernet interface eth0, and the wireless interface wlan0.

💡 Note: The ls command is a basic utility for listing directory contents, making it a quick and easy way to list network interfaces.

Using the netstat Command

The netstat command is a networking utility tool that can be used to display network connections, routing tables, interface statistics, masquerade connections, and multicast memberships. It is particularly useful for diagnosing network issues and monitoring network activity.

To Linux list network interfaces using the netstat command, use the following syntax:

netstat -i

This command will display a list of all network interfaces along with their statistics, including the number of packets received and transmitted. The output will look something like this:

In this example, the output includes the loopback interface lo, the Ethernet interface eth0, and the wireless interface wlan0. The statistics include the number of packets received and transmitted, as well as any errors or drops.

💡 Note: The netstat command is particularly useful for diagnosing network issues and monitoring network activity.

Using the ss Command

The ss command is a modern replacement for the netstat command. It is used to dump socket statistics and provides more detailed and accurate information about network connections and interfaces.

To Linux list network interfaces using the ss command, use the following syntax:

ss -tuln

This command will display a list of all network interfaces along with their listening sockets and connection states. The output will look something like this:

In this example, the output includes information about the listening sockets on various interfaces, including the local and peer addresses and ports.

💡 Note: The ss command is a modern replacement for the netstat command and provides more detailed and accurate information about network connections and interfaces.

Using the dmesg Command

The dmesg command is used to examine or control the kernel ring buffer. It can be used to display messages related to network interfaces, including information about interface detection and configuration.

To Linux list network interfaces using the dmesg command, use the following syntax:

dmesg | grep -i eth

This command will display messages related to Ethernet interfaces. You can modify the grep pattern to search for other types of interfaces, such as wireless interfaces.

💡 Note: The dmesg command is useful for diagnosing network issues by examining kernel messages related to network interfaces.

Using the ifquery Command

The ifquery command is a utility for querying network interface information. It is part of the net-tools package, which is installed by default on many Linux distributions.

To Linux list network interfaces using the ifquery command, use the following syntax:

ifquery -a

This command will display a list of all network interfaces along with their statuses and configuration settings. The output will look something like this:

In this example, the output includes the loopback interface lo, the Ethernet interface eth0, and the wireless interface wlan0. The status column indicates whether the interface is up or down, and the IP and MAC addresses are also displayed.

💡 Note: The ifquery command is useful for querying network interface information and is part of the net-tools package.

Using the iproute2 Package

The iproute2 package is a collection of utilities for controlling and monitoring network interfaces and routing. It includes the ip command, which is the preferred tool for managing network interfaces in modern Linux distributions.

To Linux list network interfaces using the iproute2 package, you can use the following commands:

ip link show
ip addr show

The ip link show command will display a list of all network interfaces along with their statuses, while the ip addr show command will display detailed information about each interface, including IP addresses and subnet masks.

💡 Note: The iproute2 package is the preferred tool for managing network interfaces in modern Linux distributions.

Using the NetworkManager Command

The NetworkManager command is a system service that provides network connectivity to the system. It manages network interfaces and connections, and can be controlled using the nmcli command.

To Linux list network interfaces using