MAN page from Other e2fsprogs-1.15-0.i386.rpm

UUIDGEN

Section: User Commands (1)
Updated: July 1999
Index

NAME

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

SYNOPSIS

uuidgen [-r] [-t]

DESCRIPTION

Theuuidgenprogram creates a new universally unique identifier (UUID) using thelibuuid(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 pastand in the future.

There are two types of UUID's which uuidgencan generate: time-based UUID's and random-based UUID's. By default uuidgenwill generatea random-based UUID if a high-quality random numbergenerator 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 mostlyof random bits. It requires that the operating system have a highquality 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.

RETURN VALUE

The UUID of the form 1b4e28ba-2fa1-11d2-883f-b9a761bde3fb (inprintf(3)format "%08x-%04x-%04x-%04x-%012x") is output to the standard output.

CONFORMING TO

OSF DCE 1.1

AUTHOR

uuidgenwas written by Andreas Dilger for libuuid.

AVAILABILITY

uuidgenis part of libuuid from the e2fsprogs package and is available for anonymousftp from tsx-11.mit.edu (and its mirrors) in /pub/linux/packages/ext2fs.

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