About This Guide
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## About This Guide

This publication documents the environment variables which are used on IRIX operating systems. It documents common environment variables used in the operating system, as well as those used by other products which run on IRIX operating systems.

In many cases, additional documentation is available about these environment variables in specific documents. See the following section for publications that contain detailed information about environment variables for specific products.

## 1. Related Publications

The following documents contain additional information that may be helpful:

- Fortran Language Reference Manual, Volume II

- ImageVision Library Programming Guide

- IRIS FailSafe Version 2 Programmer's Guide

- IRIX Admin: System Configuration and Operation

- IRIX NetWorker BusinesSuite for Informix (DBMI) Admin Guide

- IRIX NetWorker BusinesSuite Module for Oracle Administrator's Guide

- Message Passing Toolkit: MPI Programmer's Guide

- Message Passing Toolkit: PVM Programmer's Guide

- NQE User's Guide

- SpeedShop User's Guide

In addition, the following man pages provide information about environment variables used in the IRIX operating environment:

- `environ(5)`

- `pe_environ(5)`

- `catopen(3c)`

- `ctime(3f)`

- `explain(1)`

- `setenv(1)`

- `Performer(3pf)`

## 2. Obtaining Publications

To obtain SGI documentation, go to the SGI Technical Publications Library at:

    http://techpubs.sgi.com.

## 3. Conventions

The following conventions are used throughout this document:

Convention |  | Meaning
`command` |  | This fixed-space font denotes literal items such as commands, files, routines, path names, signals, messages, and programming language structures.
`manpage`(x) |  | Man page section identifiers appear in parentheses after man page names. The following list describes the identifiers:
1 | User commands
1B | User commands ported from BSD
2 | System calls
3 | Library routines, macros, and opdefs
4 | Devices (special files)
4P | Protocols
5 | File formats
7 | Miscellaneous topics
7D | DWB-related information
8 | Administrator commands
Some internal routines (for example, the `_assign_asgcmd_info`() routine) do not have man pages associated with them.
variable |  | Italic typeface denotes variable entries and words or concepts being defined.

## 4. Reader Comments

If you have comments about the technical accuracy, content, or organization of this document, please tell us. Be sure to include the title and document number of the manual with your comments. (Online, the document number is located in the front matter of the manual. In printed manuals, the document number is located at the bottom of each page.)

You can contact us in any of the following ways:

- Send e-mail to the following address:

      techpubs@sgi.com

- Use the Feedback option on the Technical Publications Library World Wide Web page:

  http://techpubs.sgi.com

- Contact your customer service representative and ask that an incident be filed in the SGI incident tracking system.

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  Technical Publications
  SGI
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  Mountain View, California 94043-1351

- Send a fax to the attention of “Technical Publications” at +1 650 932 0801.

We value your comments and will respond to them promptly.

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IRIX® Environment Variables Ready Reference |  | Chapter 1. Operating System Environment Variables