crm_uuid(8) [suse man page]

CRM_UUID(8)							  [FIXME: manual]						       CRM_UUID(8)

NAME

       crm_uuid - get a node's UUID

SYNOPSIS

	   crm_uuid [-w|-r]

DESCRIPTION

       UUIDs are used to identify cluster nodes to ensure that they can always be uniquely identified. The crm_uuid command displays and modifies
       the UUID of the node on which it is run.

       When Heartbeat is first started on a node, it creates a UUID (in binary form) in /var/lib/heartbeat/hb_uuid. This file can be read and
       written by means of crm_uuid.

	   Note
	   There are very rare circumstances when crm_uuid should be used to modify the UUID file. The most common is when it is necessary to set
	   a node's UUID to a known value when creating a new cluster.

OPTIONS

       --write, -w
	   Write a UUID value to the /var/lib/heartbeat/hb_uuid file.

	       Warning
	       Use the -w option with care, because it creates a new UUID value for the node on which it is run. Various scripts across the
	       cluster might still use the old value, causing the cluster to fail because the node is no longer associated with the old UUID
	       value. Do not change the UUID unless you changed all references to it as well.

       --read, -r
	   Read the UUID value and print it to stdout.

SEE ALSO

       /var/lib/heartbeat/hb_uuid

AUTHOR

       crm_uuid was written by Andrew Beekhof.

[FIXME: source] 						    07/05/2010							       CRM_UUID(8)

UUIDGEN(1)							   User Commands							UUIDGEN(1)

NAME

       uuidgen - create a new UUID value

SYNOPSIS

       uuidgen [options]

DESCRIPTION

       The uuidgen program creates (and prints) a new universally unique identifier (UUID) using the libuuid(3) library.  The new UUID can reason-
       ably be considered unique among all UUIDs created on the local system, and among UUIDs created on other systems in  the	past  and  in  the
       future.

       There  are two types of UUIDs which uuidgen can generate: time-based UUIDs and random-based UUIDs.  By default uuidgen will generate a ran-
       dom-based UUID if a high-quality random number generator is present.  Otherwise, it will choose a time-based UUID.  It is possible to force
       the generation of one of these two UUID types by using the -r or -t options.

OPTIONS

       -r, --random
	      Generate	a  random-based UUID.  This method creates a UUID consisting mostly of random bits.  It requires that the operating system
	      have a high quality random number generator, such as /dev/random.

       -t, --time
	      Generate a time-based UUID.  This method creates a UUID based on the system clock plus the system's ethernet  hardware  address,	if
	      present.

       -h, --help
	      Display help text and exit.

       -V, --version
	      Display version information and exit.

CONFORMING TO

       OSF DCE 1.1

AUTHOR

       uuidgen was written by Andreas Dilger for libuuid.

AVAILABILITY

       The uuidgen command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.

SEE ALSO

       libuuid(3)

util-linux							     June 2011								UUIDGEN(1)