Copyright © 2012 The FreeBSD Documentation Project
$FreeBSD:
release/9.1.0/release/doc/en_US.ISO8859-1/relnotes/article.sgml 243705 2012-11-30
16:15:35Z hrs $
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IBM, AIX, EtherJet, Netfinity, OS/2, PowerPC, PS/2, S/390, and ThinkPad are trademarks of International Business Machines Corporation in the United States, other countries, or both.
IEEE, POSIX, and 802 are registered trademarks of Institute of Electrical and Electronics Engineers, Inc. in the United States.
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SPARC, SPARC64, SPARCengine, and UltraSPARC are trademarks of SPARC International, Inc in the United States and other countries. SPARC International, Inc owns all of the SPARC trademarks and under licensing agreements allows the proper use of these trademarks by its members.
Many of the designations used by manufacturers and sellers to distinguish their products are claimed as trademarks. Where those designations appear in this document, and the FreeBSD Project was aware of the trademark claim, the designations have been followed by the " or the ® symbol.
The release notes for FreeBSD 9.1-RELEASE contain a summary of the changes made to the FreeBSD base system on the 9.1-STABLE development line. This document lists applicable security advisories that were issued since the last release, as well as significant changes to the FreeBSD kernel and userland. Some brief remarks on upgrading are also presented.
This document contains the release notes for FreeBSD 9.1-RELEASE. It describes recently added, changed, or deleted features of FreeBSD. It also provides some notes on upgrading from previous versions of FreeBSD.
This distribution of FreeBSD 9.1-RELEASE is a release distribution. It can be found at http://www.FreeBSD.org/releases/ or any of its mirrors. More information on obtaining this (or other) release distributions of FreeBSD can be found in the Obtaining FreeBSD appendix to the FreeBSD Handbook.
All users are encouraged to consult the release errata before installing FreeBSD. The errata document is updated with late-breaking information discovered late in the release cycle or after the release. Typically, it contains information on known bugs, security advisories, and corrections to documentation. An up-to-date copy of the errata for FreeBSD 9.1-RELEASE can be found on the FreeBSD Web site.
The changes since the previous release can be found at http://www.FreeBSD.org/releases/9.1R/relnotes.html.
[amd64, i386] Beginning with FreeBSD 6.2-RELEASE, binary upgrades between RELEASE versions (and snapshots of the various security branches) are supported using the freebsd-update(8) utility. The binary upgrade procedure will update unmodified userland utilities, as well as a unmodified GENERIC kernel distributed as a part of an official FreeBSD release. The freebsd-update(8) utility requires that the host being upgraded have Internet connectivity.
Source-based upgrades (those based on recompiling the FreeBSD base system from source code) from previous versions are supported, according to the instructions in /usr/src/UPDATING.
For more specific information about upgrading instructions, see http://www.FreeBSD.org/releases/9.1R/installation.html.
Important: Upgrading FreeBSD should, of course, only be attempted after backing up all data and configuration files.
FreeBSD 9.0 and later have several incompatiblities in system configuration which you might want to know before upgrading your system. Please read this section and the Upgrading Section in 9.0-RELEASE Release Notes carefully before submitting a problem report and/or posting a question to the FreeBSD mailing lists.
This file, and other release-related documents, can be downloaded from http://www.FreeBSD.org/releases/.
For questions about FreeBSD, read the documentation before contacting <questions@FreeBSD.org>.
All users of FreeBSD 9.1-STABLE should subscribe to the <stable@FreeBSD.org> mailing list.
For questions about this documentation, e-mail <doc@FreeBSD.org>.