How to see PCI devices info on CentOS 7 and RedHat Enterprise Linux 7
I
wanted to see PCI devices information on my CentOS/RHEL 7 box. But, I’m getting an error that read as, “-bash: lspci: command not found”. How do I solve this problem and see PCI devices information on CentOS/RHEL 7?
The lspci command is used to display detailed information about all PCI buses and devices in the server or desktop or laptop powered by Linux operating system. It is based on a common portable library libpci which offers access to the PCI configuration space on a variety of operating systems.
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
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:
# lspci
# lspci [options]
# lspci
# lspci -t -v
Sample outputs:
Fig.04: lspci in action
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
