What command is used in Linux to view the list of connected USB devices?

The command used in Linux to view the list of connected USB devices is indeed "lsusb." This command queries the USB subsystem for information about devices connected via the USB interface. It provides detailed information including the USB device IDs, which can be useful for troubleshooting or identifying connected hardware.

When you run "lsusb," it will display a list of USB devices along with relevant data such as the manufacturer and product IDs. This command is particularly useful in various scenarios, such as verifying whether a USB device has been properly recognized by the system or determining the type and capabilities of connected peripherals.

In contrast, the other options listed perform different functions. "lsblk" is used for listing block devices, which includes storage devices, but it does not specifically target USB devices. "lspci" is utilized to list PCI devices, which may include internal components like graphics cards and network interfaces, rather than USB connections. "lsdev" isn’t a standard command in most Linux distributions; it is more generic and might not provide the specific detail about USB devices that "lsusb" does.

Thus, "lsusb" is distinctly designed for displaying USB device information, making it the correct choice for this question.