UUIDGEN(1) | General Commands Manual | UUIDGEN(1) |
uuidgen
— generate
universally unique identifiers
uuidgen |
[-1s ] [-n
count] [-o
filename] |
The uuidgen
utility by default generates a
single universally unique identifier (UUID), also known as a globally unique
identifier (GUID). By default, uuidgen
generates a
single UUID and outputs it in the standard string representation to stdout.
The following options can be used to change the behavior of
uuidgen
:
-1
uuidgen
to not generate them in
batch, but one at a time.-n
count-o
filename-s
Batched generation yields a dense set of identifiers in such a way that there is no identifier that is larger than the smallest identifier in the set and smaller than the largest identifier in the set and that is not already in the set.
When generating the identifiers one at a time, the identifiers will be close to each other, but operating system latency and processing time will be reflected in the distance between two successive identifiers.
The uuidgen
utility exits 0 on
success, and >0 if an error occurs.
The uuidgen
command first appeared in
NetBSD 3.0.
September 13, 2004 | NetBSD 10.99 |