uuid

Generate and decode Universally Unique Identifiers (UUID). See also uuidgen. More information: https://manned.org/uuid.

• 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