mdp.rb

#!/usr/bin/ruby
# Prints out a memorable password.
#
# Example:
#    $ mdp
#    Kasubian704
#    $ mdp 3
#    trefle173
#    semilunar557
#    derride305

(ARGV.first or 1).to_i.times {
  puts open('/usr/share/dict/words') { |f|
    f.inject { |choice, line| rand < 1/f.lineno.to_f ? line : choice }.to_s.strip
  } + (rand * 1000).round.to_s
}