---
name: "sysfs.conf"
section: "5"
platform: "linux"
package: "sysfsutils"
version: "2.1.1-7"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/sysfs.conf"
---

# sysfs.conf(5)

Linux sysfs attributes setting configuration files

## NAME

sysfs.conf, sysfs.d/\*.conf - Linux sysfs attributes setting configuration files

## DESCRIPTION

These configuration files are used to set **sysfs** attribute values and modify their file mode or owner, during the system boot.

Note that these configuration files are concerned with the */sys* filesystem and should not be confused with the */etc/sysctl.conf* configuration which is concerned with the */proc/sys* filesystem instead.

## FORMAT

The syntax consists on a series of line based directives for *sysfs* attributes, those being pathnames within that filesystem, with the following format:

- *attribute* = *value*

  Set *value* for the *sysfs* *attribute*.

- **mode** *attribute* = *mode*

  Set the *mode* for the *sysfs* *attribute*. Where *mode* is any mode accepted by [**chmod**(1)](/chmod/1.md).

- **owner** *attribute* = *owner*\[:*group*\]

  Set the *owner* (and/or *group*) for the *sysfs* *attribute*. Where *owner* (and/or *group*) are any specification accepted by [**chown**(1)](/chown/1.md).

Leading and trailing whitespace (SPACE, TAB), and whitespace around the **=** character are ignored.

Comments start with a **#** character until the end of line. Empty or whitespace-only lines are also ignored.

The *attribute* paths support [**glob**(7)](/glob/7.md) wildcard patterns.

Any *attribute* that does not exist will be warned about, but will not cause the loading to fail.

## FILES

- */etc/sysfs.conf*

  The main configuration file. It gets loaded first if readable.

- */etc/sysfs.d/\*.conf*

  The optional configuration fragment files. These get loaded after the main configuration file, if readable, in glob order.

## EXAMPLES

Always use the powersave CPU frequency governor.

```
  devices/system/cpu/cpu0/cpufreq/scaling_governor = powersave
```

Use userspace CPU frequency governor and set initial speed.

```
  devices/system/cpu/cpu0/cpufreq/scaling_governor = userspace
  devices/system/cpu/cpu0/cpufreq/scaling_setspeed = 600000
```

Set permissions of suspend control file.

```
  mode power/state = 0660
  owner power/state = root:power
```

## SEE ALSO

[**sysfs**(5)](/sysfs/5.md), \<https://www.kernel.org/doc/Documentation/filesystems/sysfs.txt\>, \<https://www.kernel.org/doc/Documentation/ABI/stable/\>.