# uuidgen > Generate unique identifiers (UUIDs). > See also `uuid`. > More information: . - Create a random UUIDv4: `uuidgen --random` - Create a UUIDv1 based on the current time: `uuidgen --time` - Create a UUIDv5 of the name with a specified namespace prefix: `uuidgen --sha1 --namespace {{@dns|@url|@oid|@x500}} --name {{object_name}}`