To view details about PCI devices, which command should be used?

The command used to view details about PCI devices is "lspci." This command provides a comprehensive overview of the PCI buses and the devices connected to them, including information such as the device's vendor, model, and respective configuration settings.

When executed, "lspci" pulls from the system's PCI configuration space, allowing users to understand what hardware is installed on their Linux system specifically related to the PCI interface. This is crucial for troubleshooting hardware issues and ensuring proper driver support for connected devices.

The other options do not cater specifically to PCI devices: "pci-devices" is not a standard command in Linux distributions, "lsusb" is used for listing USB devices, and "hwinfo" provides a more general hardware overview but isn’t specifically focused on PCI devices. Thus, "lspci" stands out as the correct command for this purpose.