Unique System ID in Ruby ...?

Question

Is there a way to generate an unique Hardware dependent Identification key in Ruby...?

Tubule

Answer 1

In Ruby 1.9.2 it's built in.

require 'securerandom'
puts SecureRandom.uuid
#ff97e1e1-22d4-44cf-bf5d-ef1e26444a06

Peroxidase

actually that is not unique. it changes everytime you invoke it. it depends on what @Tubule was looking for. it it was an unique id of each hardware, your solution does not fit. – Elvia

UUIDTools timestamp_create takes mac address and current time and appears thread-safe – Medication

This is wrong. Even if we interpret "unique" in the loosest way possible, the question requests "hardware dependent" and Ruby's SecureRandom#uuid currently and has always generated V4 UUIDs, which are purely random: "It doesn't contain meaningful information such as MAC addresses, timestamps, etc." ruby-doc.org/stdlib-2.5.0/libdoc/securerandom/rdoc/Random/… – Prejudge

Answer 2

For a hardware dependent identification key, we use a MAC address.

A Media Access Control address (MAC address) is a unique identifier assigned to network interfaces for communications on the physical network segment. MAC addresses are most often assigned by the manufacturer of a network interface card (NIC) and are stored in its hardware, the card's read-only memory, or some other firmware mechanism. [wikipedia]

Here's the gem we use.

NAME

  macaddr

DESCRIPTION

  cross platform mac address determination for ruby

URI

  http://codeforpeople.com/lib/ruby
  http://rubyforg.org/projects/codeforpeople

INSTALL

  gem install macaddr

SYNOPSIS

  require 'macaddr'

  Mac.addr      #=> first mac addr on your system
  Mac.addr.list #=> all mac addrs on your system

Nitroso

Answer 3

there are lot of gems for this. just search for:

gem search -r uuid

and pick up the one you like the most.

Elvia