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UUIDGEN


Section: User Commands (1)
Updated: May 2009
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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 reasonably 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 UUID’s which
uuidgen

can generate: time-based UUID’s and random-based UUID’s. By
default
uuidgen

will generate a random-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-ng package and is available from
ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.
 

SEE ALSO

libuuid(3)



 

Index



NAME

SYNOPSIS

DESCRIPTION

OPTIONS

CONFORMING TO

AUTHOR

AVAILABILITY

SEE ALSO



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