---
name: "proc_bus"
section: "5"
platform: "linux"
package: "man-pages"
version: "6.19-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/proc_bus"
---

# proc\_bus(5)

installed buses

## NAME

/proc/bus/ - installed buses

## DESCRIPTION

- */proc/bus/*

  Contains subdirectories for installed buses.

- */proc/bus/pccard/*

  Subdirectory for PCMCIA devices when **CONFIG\_PCMCIA** is set at kernel compilation time.

- */proc/bus/pccard/drivers*

  - */proc/bus/pci/*

  Contains various bus subdirectories and pseudo-files containing information about PCI buses, installed devices, and device drivers. Some of these files are not ASCII.

- */proc/bus/pci/devices*

  Information about PCI devices. They may be accessed through [**lspci**(8)](/lspci/8.md) and [**setpci**(8)](/setpci/8.md).

## SEE ALSO

[**proc**(5)](/proc/5.md)