`uuidgen` ( 1 )

создать новое значение UUID (create a new UUID value)

Имя (Name)

uuidgen - create a new UUID value

Синопсис (Synopsis)

uuidgen [options]

Описание (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 three types of UUIDs which uuidgen can generate: time-based UUIDs, random-based UUIDs, and hash-based UUIDs. By default uuidgen will generate a random-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 first two UUID types by using the --random or --time options.

The third type of UUID is generated with the --md5 or --sha1 options, followed by --namespace namespace and --name name. The namespace may either be a well-known UUID, or else an alias to one of the well-known UUIDs defined in RFC 4122, that is @dns, @url, @oid, or @x500. The name is an arbitrary string value. The generated UUID is the digest of the concatenation of the namespace UUID and the name value, hashed with the MD5 or SHA1 algorithms. It is, therefore, a predictable value which may be useful when UUIDs are being used as handles or nonces for more complex values or values which shouldn't be disclosed directly. See the RFC for more information.

Параметры (Options)

-r, --random
           Generate a random-based UUID. This method creates a UUID
           consisting mostly of random bits. It requires that the
           operating system has 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.

       -m, --md5
           Use MD5 as the hash algorithm.

       -s, --sha1
           Use SHA1 as the hash algorithm.

       -n, --namespace namespace
           Generate the hash with the namespace prefix. The namespace is
           UUID, or '@ns' where "ns" is well-known predefined UUID
           addressed by namespace name (see above).

       -N, --name name
           Generate the hash of the name.

       -x, --hex
           Interpret name name as a hexadecimal string.

Стандарты (Conforming to)

OSF DCE 1.1

Примеры (Examples)

uuidgen --sha1 --namespace @dns --name "www.example.com"

Исходный текст на man7.org