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dmu(8)


NAME

  dmu - Dataless management utility


SYNOPSIS

  /usr/sbin/dmu


DESCRIPTION

  The dataless management utility (dmu) manages Dataless Management Services
  (DMS) environments and clients, letting you install, configure, and list
  DMS environments, and add, list, modify, or remove DMS clients. DMS
  maintains root (/), /usr, and /var file systems on a DMS server for DMS
  clients. All swapping and dumping is done on the DMS client's local disk.

  The dmu utility creates a root file system based on the software subsets
  installed in the DMS environment area on the server.	This root file system
  is accessed by DMS clients over a Local Area Network (LAN). DMS lets system
  administrators customize the root file systems before it is accessed by DMS
  clients.

				    Caution

       DMS is not supported in a clusters environment. A cluster member
       cannot be a DMS server or a dataless client.

  Dataless Management Services

  The DMS server maintains a separate copy of the root file system for each
  DMS client in a client root directory (usually /clients) in the DMS area.
  Each DMS root area is customized for the DMS client to allow for different
  environmental requirements.

  The DMS server also reserves a DMS area where copies of the /usr file
  system reside. The /usr file system is shared by DMS clients with read-only
  access.

  The server's DMS root and /usr areas are available to DMS clients through a
  network file system (NFS), with each client accessing the DMS disk area on
  the DMS server over a LAN. Each DMS client is booted over the network from
  its private root area on the DMS server. Once booted, the DMS client
  continues to use its root files and /usr files from the server's DMS area.

  DMS Environments

  One or more DMS environments can reside in a DMS area. Each DMS environment
  contains one or more root areas; a root area exists for each general type
  of DMS client supported. DMS client root areas reside in the /var/adm/dms
  directory, and are named /var/adm/dms/dmsN.arch, where N is a
  sequentially-assigned integer starting with 0 and arch is a name
  identifying the client's machine architecture, such as alpha. The first DMS
  area for Alpha clients would be named /var/adm/dms/dms0.alpha.

  DMS Client Areas

  DMS maintains a DMS client area in the /clients directory.  Each root area
  for an individual DMS client is tailored from the appropriate generic root
  file system, and contains a customized kernel to support that DMS client's
  actual system configuration.

  Each DMS client views its private root area and the shared /usr area as
  local although these areas actually reside on the DMS server and are
  accessed through NFS. As with the /var/adm/dms area, multiple client areas
  can be established in different partitions.

  DMS Software Installation

  Use the dmu utility's Install Software option to install software into each
  /var/adm/dms/dmsN.arch file system.  All software must be installed and
  configured in the DMS server area before DMS clients can be added to the
  DMS environment.

  DMS Client Registration

  Before you use the dmu utility to serve a DMS client, you must register the
  DMS client for a DMS area or make an entry for the DMS client in the
  /etc/hosts file on the DMS server. You must have the following information
  to register a DMS client:

    ·  The client's host name.

    ·  The /var/adm/dms/dmsN.arch DMS environment where the DMS client will
       be registered.

    ·  The location of the DMS client's root directory. The path must not
       exceed 25 characters and be located under the /clients directory.

    ·  The DMS client's network interface, subnet mask, and default route for
       this network interface.

    ·  The DMS client's hardware network address.

    ·  The gateway address between the DMS client and server.

    ·  The swap device and partition and swap device type.

    ·  The type of kernel build support to be provided for the DMS client.


RESTRICTIONS

  You must log in as root or have superuser privileges to invoke the dmu
  utility.

  Tru64 UNIX DMS servers do not support dataless environments on DMS clients
  that do not support the BOOTP Internet Boot Protocol.

  DMS is not supported in a clusters environment. A cluster member cannot be
  a DMS server or a dataless client.


EXAMPLES

  The following command invokes the dmu utility from the root system prompt
  on the DMS server:

       # /usr/sbin/dmu

  You see the DMU Main Menu, and you can select dmu functions.

       *** DMU Main Menu ***

       Choices without key letters are not available.

	   a) ADD a client
	   c) CONFIGURE software environments
	   d) DELETE software environments
	   i) INSTALL software environments
	   l) LIST registered clients
	   m) MODIFY a client
	   r) REMOVE a client
	   s) SHOW software environments
	   x) EXIT

       Enter your choice:

  Available menu options depend upon previous actions. For example, you
  cannot list, modify, or remove clients until you have added at least one
  DMS client. In that case, the m, l, and r key letters are not shown in
  front of their respective options:

       a) ADD a client
	   c) CONFIGURE software environments
	   d) DELETE software environments
	   i) INSTALL software environments
	    ) LIST registered clients
	    ) MODIFY a client
	    ) REMOVE a client
	   s) SHOW software environments
	   x) EXIT


FILES

  /var/adm/dms
      Base directory for Dataless Management Services

  /clients/hostname
      Default location of client's root directory

  /var/adm/dms/clients/dmsdb
      DMS client database file


SEE ALSO

  Commands: bindconfig(8), doconfig(8), nissetup(8), pmerge(8), setld(8)

  Files: bootptab(4)

  Sharing Software on a Local Area Network

  Installation Guide

  Installation Guide -- Advanced Topics

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