---
name: "ri1.9.1"
section: "1"
platform: "linux"
package: "ruby1.9.1"
version: "1.9.3.194-8.1+deb7u5"
release: "Debian 7 (Wheezy)"
platforms: ["linux"]
url: "https://new.carta.tech/ri1.9.1"
---

# ri1.9.1(1)

Ruby Information at your fingertips

## NAME

ri1.9.1 - Ruby Information at your fingertips

## SYNOPSIS

ri1.9.1 \[options\] \[names...\]

## DESCRIPTION

*ri1.9.1* displaies information on Ruby classes, modules, and methods. You can give the names of classes or methods to see their documentation. Partial names may be given: if the names match more than one entity, a list will be shown, otherwise details on that entity will be displayed.

Nested classes and modules can be specified using the normal Name::Name notation, and instance methods can be distinguished from class methods using "." (or "#") instead of "::".

For example:

```
    ri1.9.1 File
    ri1.9.1 File.new
    ri1.9.1 F.n
    ri1.9.1 zip
```

Note that shell quoting may be required for method names containing punctuation:

```
    ri1.9.1 'Array.[]'
    ri1.9.1 compact\!
```

## OPTIONS

- **--classes, -c**

  Display the names of classes and modules we know about.

- **--doc-dir, -d dirname**

  A directory to search for documentation. If not specified, we search the standard rdoc/ri directories.

- **--format, -f name**

  Format to use when displaying output: ansi, bs, html, plain, simple.  Use ´bs' (backspace) with most pager programs.  To use ANSI, either also use the -T option, or tell your pager to allow control characters.  (for example using the -R option to less.)

- **--list-names, -l**

  List all the names known to RDoc, one per line.

- **--no-pager, -T**

  Send output directly to stdout.

- **--width, -w width**

  Set the width of the output.

- **--version, -v**

  Display the version of ri1.9.1.

- **--help, -h**

  Display help.

Options may also be passed in the 'RI' environment variable