Chapter 1 Introduction

The Solaris 9 Maintenance Update 1 Installation Guide explains how to install and back out the Solaris^TM 9 Maintenance Update^TM 1 (MU1) software. This guide is for system administrators installing the MU1 software. For late-breaking MU1 issues identified too late to be included in this guide, refer to the Solaris 9 Maintenance Update 1 Installation Guide at http://docs.sun.com.

If you need more information on general procedures for system administration, refer to the Solaris 9 System Administrator Collection Solaris 9 System Administrator Collection.

What Is the Solaris 9 Maintenance Update 1

The Solaris 9 MU1 contains the same set of patches as those prepackaged on the Solaris 9 9/02 software CDs. The MU1 installation automatically updates your system without regressing any patches you have previously installed.

The Solaris 9 MU1 is available as a file for download from the Web.

When to Install the Solaris 9 Maintenance Update 1

If your system is running the Solaris 9 operating environment, and you want to apply patches released in the Solaris 9 9/02 operating environment, without losing patches you previously applied to your system, install the Solaris 9 MU1. Patches applied using the MU1 can be backed out.

If your system is running the Solaris 9 operating environment, or a Solaris 9 Update release, and you want to fully upgrade to new features and hardware support, install the Solaris 9 9/02 operating environment. The patches applied by installing the Solaris 9 9/02 operating environment will replace any previously installed Solaris 9 patches and cannot be backed out of the release.

Maintenance Updates are primarily designed to update the Solaris operating environment to a known, tested patch-level. If you want to apply a particular patch, and only that patch, do so through your normal support channels.

The name of this product is Solaris 9 MU1, but code or package path names might use Solaris 2.9 or SunOS^TM 5.9. Always follow the code or path as it is written in this document.