---
title: Telegraf Documentation
description: Telegraf plugin for collecting metrics from Linux Sysctl Filesystem
url: https://docs.influxdata.com/telegraf/v1/input-plugins/linux_sysctl_fs/
estimated_tokens: 766
product: Telegraf
version: v1
---

-   Telegraf v1.24.0+

# Linux Sysctl Filesystem Input Plugin

This plugin gathers metrics by reading the [system filesystem](https://www.kernel.org/doc/Documentation/sysctl/fs.txt) files on [Linux](https://kernel.org/) systems.

**Introduced in:** Telegraf v1.24.0 **Tags:** system **OS support:** linux

## Global configuration options

Plugins support additional global and plugin configuration settings for tasks such as modifying metrics, tags, and fields, creating aliases, and configuring plugin ordering. See [CONFIGURATION.md](/telegraf/v1/configuration/#plugins) for more details.

## Configuration

```toml
# Provides Linux sysctl fs metrics
[[inputs.linux_sysctl_fs]]
  # no configuration
```

## Metrics

`linux_sysctl_fs` metric:

-   tags: *none*
-   fields:
    -   `aio-max-nr` (unsigned integer)
    -   `aio-nr` (unsigned integer)
    -   `dentry-age-limit` (unsigned integer)
    -   `dentry-nr` (unsigned integer)
    -   `dentry-unused-nr` (unsigned integer)
    -   `dentry-want-pages` (unsigned integer)
    -   `dquot-max` (unsigned integer)
    -   `dquot-nr` (unsigned integer)
    -   `inode-free-nr` (unsigned integer)
    -   `inode-nr` (unsigned integer)
    -   `inode-preshrink-nr` (unsigned integer)
    -   `super-max` (unsigned integer)
    -   `super-nr` (unsigned integer)
    -   `file-max` (unsigned integer)
    -   `file-nr` (unsigned integer)

## Example Output

```text
> linux_sysctl_fs,host=foo dentry-want-pages=0i,file-max=44222i,aio-max-nr=65536i,inode-preshrink-nr=0i,dentry-nr=64340i,dentry-unused-nr=55274i,file-nr=1568i,aio-nr=0i,inode-nr=35952i,inode-free-nr=12957i,dentry-age-limit=45i 1490982022000000000
```

#### Related

-   [Configure plugins](/telegraf/v1/configure_plugins/)
-   [Linux Sysctl Filesystem Plugin Source](https://github.com/influxdata/telegraf/tree/v1.38.4/plugins/inputs/linux_sysctl_fs/README.md)