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How To Check Available USB Ports on Ubuntu 18.04

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In this article, we will be discussing how to check the available USB ports on your Ubuntu 18.04 system. This is a crucial task for system administrators and general users alike, as it allows you to troubleshoot hardware issues, identify connected devices, and understand your system’s USB capabilities.

Quick Answer

To check the available USB ports on Ubuntu 18.04, you can use the lsusb command to list all connected USB devices and their corresponding bus and device numbers. Additionally, you can use the lspci command with the grep filter to specifically list the USB controllers.

Understanding USB Ports

USB (Universal Serial Bus) ports are standard connection interfaces on PCs and many other electronic devices. They are used to connect peripherals such as keyboards, mice, printers, and storage devices. In Ubuntu, like in other Linux distributions, you can check the status of these ports using built-in command-line tools.

Checking USB Ports with lsusb

The lsusb command is a utility for displaying information about USB buses in the system and the devices connected to them. To use it, open a terminal window by pressing Ctrl + Alt + T and type the following command:

lsusb

This command will list all the connected USB devices on your system. Each device will have a corresponding line that includes the bus number and the device number. The bus number represents the USB controller, and the device number represents the USB port.

Understanding the lspci Command

Another useful command for checking USB ports in Ubuntu is lspci. This command lists all the PCI buses and details about the devices connected to them.

To specifically list the USB controllers, you can use the lspci command with the grep filter. Run the following command:

lspci | grep -i usb

This will display the USB controllers on your system. Each line will provide information about the USB controller, including the bus number and the device number.

Troubleshooting Non-Functioning USB Ports

Please note that these methods will only show the USB controllers and ports that are currently recognized by the system. If a USB port is not functioning properly, it may not be listed. In that case, you may need to check the hardware connections or consult the documentation for your specific board or device.

Conclusion

Understanding the USB architecture of your system is crucial for troubleshooting and system administration. The lsusb and lspci commands provide a straightforward way to list and understand the USB ports and controllers on your Ubuntu 18.04 system.

Remember, the concept of USB ports can be complex, with separate controllers, hubs, and virtual/physical ports. Mapping virtual ports to physical ports may not be possible through software alone. But, with the right knowledge and tools, you can effectively manage and troubleshoot your USB connections.

For further reading, you can refer to the man pages for these commands by typing man lsusb or man lspci in the terminal. You can also visit the Ubuntu documentation for more detailed information.

How do I open a terminal window in Ubuntu 18.04?

To open a terminal window in Ubuntu 18.04, you can press Ctrl + Alt + T.

What is the purpose of USB ports?

USB ports are standard connection interfaces used to connect peripherals such as keyboards, mice, printers, and storage devices to PCs and other electronic devices.

How can I check the connected USB devices in Ubuntu 18.04?

You can use the lsusb command in the terminal to list all the connected USB devices on your Ubuntu 18.04 system.

How can I check the USB controllers in Ubuntu 18.04?

You can use the lspci command with the grep filter to specifically list the USB controllers in Ubuntu 18.04. The command is lspci | grep -i usb.

What should I do if a USB port is not functioning properly?

If a USB port is not functioning properly, you may need to check the hardware connections or consult the documentation for your specific board or device. The methods mentioned in this article will only show the USB controllers and ports that are currently recognized by the system.

Where can I find more information about Ubuntu 18.04?

You can visit the Ubuntu documentation for more detailed information about Ubuntu 18.04 and its features.

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