uuidgen - Unix, Linux Command
uuidgen - command-line utility to create a new UUID value
program creates a new universally unique identifier (UUID) using the
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 two types of UUIDs which
uuidgen can generate: time-based UUIDs and random-based UUIDs. By
uuidgen will generate a random-based UUID if a high-quality random number
generator is present. Otherwise, it will chose a time-based UUID. It
is possible to force the generation of one of these two
UUID types by using the
Generate a random-based UUID. This method creates a UUID consisting mostly
of random bits. It requires that the operating system have a high
quality random number generator, such as
Generate a time-based UUID. This method creates a UUID based on the system
clock plus the systems ethernet hardware address, if present.
The UUID of the form 1b4e28ba-2fa1-11d2-883f-b9a761bde3fb (in
format "%08x-%04x-%04x-%04x-%012x") is output to the standard output.
OSF DCE 1.1
was written by Andreas Dilger for libuuid.
is part of libuuid from the e2fsprogs package and is available from