lspci command to list all PCI devices. Use the command lspci -v for more verbose information or lspci -vv for very verbose output.
lspci can be used to determine the manufacturer, model, and memory size of a system's video card:
~]$ lspci -v
[output truncated]
00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
Subsystem: Lenovo Device 20e4
Flags: bus master, fast devsel, latency 0
Memory at f4200000 (64-bit, non-prefetchable) [size=1M]
Capabilities: [d0] Power Management version 3
[output truncated]lspci is also useful to determine the network card in your system if you do not know the manufacturer or model number.