gistfile1.rb

require 'yaml'
require 'pry'

passwd_file = File.readlines('/etc/passwd')
@yaml_hash  = {}

passwd_file.each do |line|
  line_array   = line.split(':')
  username     = line_array[0]
  realname     = line_array[4]
  homedir      = line_array[5]
  uid          = line_array[2]
  homedir_size = 'Directory does not exist'

  if realname == ''
    realname = 'Not present in file'
  end

  if uid.to_i > 10
    if File.exists?(homedir)
      homedir_size = %x{du -sh #{homedir} 2>/dev/null }.split.first
    end
    @yaml_hash[username] = {}
    @yaml_hash[username]['realname']     = realname
    @yaml_hash[username]['homedir']      = homedir
    @yaml_hash[username]['uid']          = uid
    @yaml_hash[username]['homedir_size'] = homedir_size
  end
end

File.open('/tmp/passwd.yaml', 'w') do |f|
  f.write(@yaml_hash.to_yaml)
end