uuidgen(1) [netbsd man page]

UUIDGEN(1)						    BSD General Commands Manual 						UUIDGEN(1)

NAME

     uuidgen -- generate universally unique identifiers

SYNOPSIS

     uuidgen [-1s] [-n count] [-o filename]

DESCRIPTION

     The uuidgen utility by default generates a single universally unique identifier (UUID), also known as a globally unique identifier (GUID).
     By default, uuidgen generates a single UUID and outputs it in the standard string representation to stdout.  The following options can be
     used to change the behavior of uuidgen:

	   -1		  This option only has effect if multiple identifiers are to be generated and instructs uuidgen to not generate them in
			  batch, but one at a time.

	   -n count	  This option controls the number of identifiers generated.  By default, multiple identifiers are generated in batch.

	   -o filename	  Redirect output to filename instead of stdout.

	   -s		  Output UUIDs as initialized C structures, rather than in the standard string format.

     Batched generation yields a dense set of identifiers in such a way that there is no identifier that is larger than the smallest identifier in
     the set and smaller than the largest identifier in the set and that is not already in the set.

     When generating the identifiers one at a time, the identifiers will be close to each other, but operating system latency and processing time
     will be reflected in the distance between two successive identifiers.

DIAGNOSTICS

     The uuidgen utility exits 0 on success, and >0 if an error occurs.

SEE ALSO

     uuidgen(2), uuid(3)

HISTORY

     The uuidgen command first appeared in NetBSD 3.0.

BSD
								September 13, 2004							       BSD

Check Out this Related Man Page

UUIDGEN(1)						      General Commands Manual							UUIDGEN(1)

NAME

       uuidgen - command-line utility to create a new UUID value

SYNOPSIS

       uuidgen [-r|-t]

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 chose 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     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     Generate a time-based UUID.  This method creates a UUID based on the system clock plus the system's ethernet  hardware  address,	if
	      present.

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)

Linux								     May 2009								UUIDGEN(1)

Linux and UNIX Man Pages

uuidgen(1) [netbsd man page]

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