---
name: "ohai"
section: "1"
platform: "linux"
package: "ohai"
version: "13.8.0-1"
release: "Debian 10 (Buster)"
platforms: ["linux"]
url: "https://new.carta.tech/ohai"
---

# ohai(1)

The man page for the ohai command line tool. Ohai is a tool that is used to detect attributes on a node, and then provide these attributes to the chef-client at the start of every chef-client run. Ohai is required by the chef-client and must be present on a node. (Ohai is installed on a node as part of the chef-client install process.) The types of attributes Ohai collects include (but are not limited to): Attributes that are collected by Ohai are automatic attributes, in that these attributes are used by the chef-client to ensure that these attributes remain unchanged after the chef-client is done configuring the node. ohai is the command-line interface for Ohai, a tool that is used to detect attributes on a node, and then provide these attributes to the chef-client at the start of every chef-client run.

## NAME

ohai - The man page for the ohai command line tool.

Ohai is a tool that is used to detect attributes on a node, and then provide these attributes to the chef-client at the start of every chef-client run. Ohai is required by the chef-client and must be present on a node. (Ohai is installed on a node as part of the chef-client install process.)

The types of attributes Ohai collects include (but are not limited to):

- •

  Platform details

- •

  Network usage

- •

  Memory usage

- •

  Processor usage

- •

  Kernel data

- •

  Host names

- •

  Fully qualified domain names

- •

  Other configuration details

Attributes that are collected by Ohai are automatic attributes, in that these attributes are used by the chef-client to ensure that these attributes remain unchanged after the chef-client is done configuring the node.

ohai is the command-line interface for Ohai, a tool that is used to detect attributes on a node, and then provide these attributes to the chef-client at the start of every chef-client run.

## OPTIONS

This command has the following syntax:

```
ohai OPTION
```

This tool has the following options:

- **ATTRIBUTE\_NAME ATTRIBUTE NAME ...**

  Use to have Ohai show only output for named attributes.

- **-d PATH, --directory PATH**

  The directory in which Ohai plugins are located. For example: **/etc/ohai/plugins**.

- **-h, --help**

  Shows help for the command.

- **-l LEVEL, --log\_level LEVEL**

  The level of logging that will be stored in a log file.

- **-L LOGLOCATION, --logfile c**

  The location in which log file output files will be saved. If this location is set to something other than **STDOUT**, standard output logging will still be performed (otherwise there would be no output other than to a file).

- **-v, --version**

  The version of Ohai.

## AUTHOR

Opscode