How to see PCI devices info on CentOS 7 and RedHat Enterprise Linux 7

Why do I get “-bash: lspci: command not found” error?

The following error indicates that the lspci command not installed on your system when you install CentOS server or it was removed:

Fig.01: Fix bash: lspci: command not found on CentOS 7 server

The fix to see PCI devices info on CentOS 7 and RedHat Enterprise Linux 7

Simply install the pciutils package on CentOS/RHEL 7 server:
# yum install pciutils
Sample outputs:

Fig.02: CentOS install pciutils package

Update the PCI ID list

To download new version of the PCI ID list, enter:
# update-pciids
Sample outputs:

Fig.03: Download new version of the PCI ID list

How do I list all PCI devices?

Type the following command to view PCI devices info on CentOS 7 or RHEL 7:
# lspci
# lspci [options] # lspci
# lspci | more
# lspci -t -v

Sample outputs:

Fig.04: lspci in action

How to see wifi PCI devices info on CentOS 7 / RHEL 7

Run the lspci command and filter out information using the grep command or egrep command:
lspci | egrep -i 'wifi|wireless'
04:00.0 Network controller: Intel Corporation Wireless 7260 (rev bb)
Guess what the following command does?
# lspci | egrep -i 'eth|network|wifi|wireless'
Want to find out wifi or Ethernet driver name on a CentOS 7 or RedHat Enterprise Linux 7? Try:
lspci -s 04:00.0 -v
Sample outputs:

04:00.0 Network controller: Intel Corporation Wireless 7260 (rev bb)
	Subsystem: Intel Corporation Dual Band Wireless-AC 7260
	Flags: bus master, fast devsel, latency 0, IRQ 57
	Memory at c1500000 (64-bit, non-prefetchable) [size=8K]
	Capabilities: [c8] Power Management version 3
	Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [40] Express Endpoint, MSI 00
	Capabilities: [100] Advanced Error Reporting
	Capabilities: [140] Device Serial Number 7c-5c-f8-ff-ff-8e-33-a2
	Capabilities: [14c] Latency Tolerance Reporting
	Capabilities: [154] Vendor Specific Information: ID=cafe Rev=1 Len=014 <?>
	Kernel driver in use: iwlwifi
	Kernel modules: iwlwifi

See “Linux Find Wireless Driver Chipset Information” for more info.

More info

Here is a list of all options from lspci man page:

Basic display modes:
-mm		Produce machine-readable output (single -m for an obsolete format)
-t		Show bus tree
 
Display options:
-v		Be verbose (-vv for very verbose)
-k		Show kernel drivers handling each device
-x		Show hex-dump of the standard part of the config space
-xxx		Show hex-dump of the whole config space (dangerous; root only)
-xxxx		Show hex-dump of the 4096-byte extended config space (root only)
-b		Bus-centric view (addresses and IRQ's as seen by the bus)
-D		Always show domain numbers
 
Resolving of device ID's to names:
-n		Show numeric ID's
-nn		Show both textual and numeric ID's (names & numbers)
-q		Query the PCI ID database for unknown ID's via DNS
-qq		As above, but re-query locally cached entries
-Q		Query the PCI ID database for all ID's via DNS
 
Selection of devices:
-s [[[[<domain>]:]<bus>]:][<slot>][.[<func>]]	Show only devices in selected slots
-d [<vendor>]:[<device>]			Show only devices with specified ID's
 
Other options:
-i <file>	Use specified ID database instead of /usr/share/hwdata/pci.ids
-p <file>	Look up kernel modules in a given file instead of default modules.pcimap
-M		Enable `bus mapping' mode (dangerous; root only)
 
PCI access options:
-A <method>	Use the specified PCI access method (see `-A help' for a list)
-O <par>=<val>	Set PCI access parameter (see `-O help' for a list)
-G		Enable PCI access debugging
-H <mode>	Use direct hardware access (<mode> = 1 or 2)
-F <file>	Read PCI configuration dump from a given file

Conclusion

You just learned how to use lspci and other command line utilties to find out information about your PCI devices on a CentOS 7 or RHEL 7. The PCI Utilities are a collection of Linux utilities for inspecting and manipulating configuration of PCI devices. I suggest you read the following info:

• Linux Command To Find the System Configuration And Hardware Information
• Linux List Hardware Information Command
• 8 Linux Commands: To Find Out Wireless Network Speed, Signal Strength And Other Information
• See the official page here.