sponsored by
OSdata.com: ULTRIX 




    ULTRIX is a UNIX-based operating system made by DEC. ULTRIX has been replaced by Digital UNIX.


OSdata.com is used in more than 300 colleges and universities around the world

Find out how to get similar high web traffic and search engine placement.

Intended purpose

server/mainframe: medium to high scale servers; minicomputers; mainframes

desktop/workstation: workstations (for those with UNIX familiarity)

handheld: not appropriate

real time: not appropriate

Kind of OS: proprietary UNIX

    “ULTRIX is a 4.2BSD based UNIX operating system with enchancements from 4.3BSD and System V Release 2. It also includes a variety of enchancements specific to Digital hardware systems.” — Alan Rollowe100

Release Date:

Current Version: V4.5e100


    “Depends on the target hardware, but generally; expensive. Unfortunately, the last “powers that be” in Digital priced it so that the few license sales would generate enough income to offset the development costs.“ — Alan Rollowe100

Hardware Supported: VAX, MIPSe53

    “ULTRIX runs on VAX and MIPS (R2000, R3000 or R4000 series)” — Joshua Copee53

    “O-VMS should run on any of the VAXen, including MicroVAX, VAXStation, and VAXServer after the MicroVAX 1. Ultrix will run on all the above, plus any of the DECStation line.” — Bruce Lanee51

    Performance information about Digital products: www.compaq.com/alphaserver/download/alphaserver_gs_benchmark_performance_v2.pdf

    VAX-11 assembly language is discussed in the assembly language section.

Maximum Number of Processors: 6 (in some models of VAX 6000)e100

Number of bits: 32e100

Kernel: “Based on Berkeley 4.2BSD with enhancements from 4.3BSD and System V Release 2.” — Alan Rollowe100

POSIX: compatible

Peripherals: “Refer to the Software Product Description for the complete list of supported devices by system. Not all systems support all devices, though some offer considerable overlap.” — Alan Rollowe100

File Systems Supported:

Other Systems Emulated:

Graphics Engine: “X10 or X11 depending on the version” — Alan Rollowe100

Text Command Shell: UNIX shells

User Interface (graphic): “X10 on older versions. DECwindows on intermediate versions. Motif on current versions.” — Alan Rollowe100

Graphic Command Shell:

Disabled support:

Internet Services:

Application Programs:




references within this web site

further reading: web sites

Please send recommendations on additional URLs to Milo.

official web sites

    http://www.digital.com/info/SP2640/ “The ULTRIX Operating System, Version 4.5”e53



(Frequently Asked Questions)

    ftp://ftp.digital.com/pub/Digital/dec-faq/ultrix “Ultrix FAQ”

    ftp://ftp.digital.com/pub/Digital/dec-faq/common “Ultrix and DEC OSF/1 AXP FAQ”

    ftp://ftp.digital.com/pub/Digital/dec-faq/ultrix-disktabs “Ultrix Disktabs”

    ftp://ftp.digital.com/pub/Digital/dec-faq/ultrix-printcap “Ultrix Printcaps”

    ftp://ftp.digital.com/pub/Digital/dec-faq/decinfo “DEC general FAQ”

user group web sites

other related web sites

    http://hal.csn.ul.ie/pub/ultrix_freeware/ “Ultrix Freeware”; the *BIGGEST* freeware archive for ULTRIX. FTP at ftp://ftp.skynet.ie/pub/ultrix_freeware/

    http://home.earthlink.net/~bhami/rosetta.html “Rosetta Stone for Unix”; a guide for comparable commands and directories in several popular forms of UNIX (AIX, Darwin, DG-UX, FreeBSD, HP-UX, IRIX, Linux, NetBSD, OpenBSD, SCO OpenServer, Solaris, SunOS, Tru64, and ULTRIX).

    http://www.unix-vs-nt.org/ John Kirch’s article “Microsoft Windows NT Server 4.0 versus UNIX”

further reading: books

    For more UNIX book listings, see also the general book listings on the UNIX web page.

If you want your book reviewed, please send a copy to: Milo, POB 1361, Tustin, CA 92781, USA.

Price listings are for courtesy purposes only and may be changed by the referenced businesses at any time without notice.

further reading: books: introductory/general

    Unix for VMS Users (Digital Press Vax Users Series); reprint edition; by Philip E. Bourne; Digital Press; February 1994; ISBN 1555580343; paperback; 368 pages; $39.95

A Practical Guide to the Unix System; by Mark G. Sobell; Addison-Wesley Pub Co; October 1994; ISBN 0805375651; paperback; 800 pages; $37.95

further reading: books: administration

Essential System Administration: Help for Unix System Administrators (Nutshell Handbook); 2nd edition; by Aeleen Frisch; O’Reilly & Associates; December 1996; ISBN 1565921275; paperback; 788 pages; $27.96

The Complete Guide to Netware 4.11/Intranetware; 2nd edition; by James E. Gaskin; Sybex; December 1996; ISBN 078211931X; paperback; $47.99; includes information on getting NetWare working with Windows, Macintosh, UNIX, and OS/2

further reading: books: internet

Building a Unix Internet Server; by George Eckel; New Riders Publishing; June 1995; ISBN 1562054945; paperback (with CD-ROM); 325 pages; $30.40

further reading: books: enterprise/business

further reading: books: content creation

further reading: books: programming

Advanced Programming in the Unix Environment (Addison-Wesley Professional Computing Series); by W. Richard Stevens; Addison-Wesley Pub Co; June 1992; ISBN 0201563177; hardcover; 744 pages; $63.95

further reading: books: hardware

further reading: books: miscellaneous

In Association with Amazon.com

If you want your book reviewed, please send a copy to: Milo, POB 1361, Tustin, CA 92781, USA.

geek humor

    “If you’re a UNIX user, all UNIX are pretty much the same. If you’re a UNIX programmer, all UNIX are a little bit different. If you’re a UNIX system admin, all UNIX are completely different! That’s comming from ULTRIX, AIX, HP-UX, Solaris, and Digital UNIX experiences. Might as well count linux, too.” —Bob Koehler, Hubble Space Telescope Payload Flight Software Team

OSdata.com is used in more than 300 colleges and universities around the world

Read details here.

    A web site on dozens of operating systems simply can’t be maintained by one person. This is a cooperative effort. If you spot an error in fact, grammar, syntax, or spelling, or a broken link, or have additional information, commentary, or constructive criticism, please e-mail Milo. If you have any extra copies of docs, manuals, or other materials that can assist in accuracy and completeness, please send them to Milo, PO Box 1361, Tustin, CA, USA, 92781.

    If you have an extra or unwanted copy of any official manuals or documentation on this operating system, please send them to: Milo, POB 1361, Tustin, CA 92781, USA. I have the following items: NONE.

    Note: I am looking for a fan of ULTRIX who has the time to check this web site for completeness and accuracy regarding ULTRIX. Just check through the site about once a week or so and report back with any information (including the URL of the web page you are reporting).

    Click here for our privacy policy.

Click here to skip over the summaries of individual operating systems.

previous page next page
previous page next page

home page

peer level









Digital UNIX (or DUNIX)


GNU Hurd





Mac OS X









OpenVMS (or OVMS)


OS/2 Warp

OS/2 Warp Server










Windows 3.1

Windows 95

Windows 98

Windows NT

Windows NT Server

Windows NT Server Enterprise Edition

Made with Macintosh

    This web site handcrafted on Macintosh computers using Tom Bender’s Tex-Edit Plus and served using FreeBSD .

Viewable With Any Browser

    †UNIX used as a generic term unless specifically used as a trademark (such as in the phrase “UNIX certified”). UNIX is a registered trademark in the United States and other countries, licensed exclusively through X/Open Company Ltd.

    AlphaGeneration, AlphaServer, AlphaStation, Alpha AXP, AXP, DEC, DECstation, DECsystem, OpenVMS, ULTRIX, VAX, and VMS are trademarks of COMPAQ Computer Corporation. OSF/1 is a registered trademark of the Open Software Foundation. Names and logos of various OSs are trademarks of their respective owners.

    Copyright © 1998, 1999, 2000, 2001, 2002 Milo

    Last Updated: April 10, 2002

    Created: June 22, 1998

Click here to skip over the summaries of individual operating systems.

previous page next page
previous page next page