uuid(3) — Linux manual page


UUID(3)                    Programmers Manual                    UUID(3)

NAME         top

       uuid - DCE compatible Universally Unique Identifier library

SYNOPSIS         top

       #include <uuid.h>

DESCRIPTION         top

       The UUID library is used to generate unique identifiers for
       objects that may be accessible beyond the local system. This
       library generates UUIDs compatible with those created by the Open
       Software Foundation (OSF) Distributed Computing Environment (DCE)
       utility uuidgen(1).

       The UUIDs generated by this library can be reasonably expected to
       be unique within a system, and unique across all systems. They
       could be used, for instance, to generate unique HTTP cookies
       across multiple web servers without communication between the
       servers, and without fear of a name clash.

CONFORMING TO         top

       This library generates UUIDs compatible with OSF DCE 1.1, and
       hash based UUIDs V3 and V5 compatible with RFC-4122

AUTHORS         top

       Theodore Y. Ts’o

SEE ALSO         top

       uuid_clear(3), uuid_compare(3), uuid_copy(3), uuid_generate(3),
       uuid_is_null(3), uuid_parse(3), uuid_time(3), uuid_unparse(3)

REPORTING BUGS         top

       For bug reports, use the issue tracker at

AVAILABILITY         top

       The libuuid library is part of the util-linux package since
       version 2.15.1. It can be downloaded from Linux Kernel Archive
       <https://www.kernel.org/pub/linux/utils/util-linux/>. This page
       is part of the util-linux (a random collection of Linux
       utilities) project. Information about the project can be found at
       ⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩. If you have
       a bug report for this manual page, send it to
       util-linux@vger.kernel.org. This page was obtained from the
       project's upstream Git repository
       ⟨git://git.kernel.org/pub/scm/utils/util-linux/util-linux.git⟩ on
       2024-06-14. (At that time, the date of the most recent commit
       that was found in the repository was 2024-06-10.) If you discover
       any rendering problems in this HTML version of the page, or you
       believe there is a better or more up-to-date source for the page,
       or you have corrections or improvements to the information in
       this COLOPHON (which is not part of the original manual page),
       send a mail to man-pages@man7.org

util-linux 2.39.594-1e0ad      2023-07-19                        UUID(3)

Pages that refer to this page: uuid_clear(3)uuid_compare(3)uuid_copy(3)uuid_generate(3)uuid_is_null(3)uuid_parse(3)uuid_time(3)uuid_unparse(3)uuidd(8)