There are many simple commands that perform wonders on Linux-based system. If you trying to find out more information about all PCI (Peripheral Component Interconnect) buses and devices on your system, then this command will be very helpful for you.

The command is:

lspci

It is  a command that prints detailed information about all PCI buses and devices in the system. lspci is based on a common portable library libpci which offers access to the PCI configuration space on a variety of operating systems. To make use of all the features of this program, you need to have Linux kernel 2.1.82 or newer which supports the /proc/bus/pci interface. With older kernels, the PCI utilities have to use direct hardware access which is available only to root and it suffers from numerous race conditions and other problems.

* If many devices are shown as unknown (e.g. "Unknown device 2830 (rev 02)), issuing the command ‘update-pciids’ will usually do the trick.