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uuid

Generate and decode Universally Unique Identifiers (UUID).

See also `uuidgen`.

More information.

• Generate a UUIDv1 (based on time and system's hardware address, if present):

uuid

• Generate a UUIDv4 (based on random data):

uuid -v {4}

• Generate multiple UUIDv4 identifiers at once:

uuid -v {4} -n {number_of_uuids}

• Generate a UUIDv4 and specify the output format:

uuid -v {4} -F {BIN|STR|SIV}

• Generate a UUIDv4 and write the output to a file:

uuid -v {4} -o {path/to/file}

• Generate a UUIDv5 (based on the supplied object name) with a specified namespace prefix:

uuid -v {5} ns:{DNS|URL|OID|X500} {object_name}

• Decode a given UUID:

uuid -d {uuid}

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