Ruby on Rails

Hi

I installed mysql server on ubuntu 15.04 and gem mysql2

When run command rake db:create display error:

Resque::Helpers will be gone with no replacement in Resque 2.0.0.
Resque::Helpers will be gone with no replacement in Resque 2.0.0.
[WARNING] The git gem requires git 1.6.0.0 or later, but only found 2.1.4. You should probably upgrade.

Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)
Couldn't create database for {"adapter"=>"mysql2", "encoding"=>"utf8", "reconnect"=>false, "database"=>"bd_development", "pool"=>5, "username"=>"root", "password"=>123, "socket"=>"/tmp/mysql.sock"}, charset: utf8, collation: utf8_unicode_ci
(if you set the charset manually, make sure you have a matching collation)

Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)
Couldn't create database for {"adapter"=>"mysql2", "encoding"=>"utf8", "reconnect"=>false, "database"=>"bd_test", "pool"=>5, "username"=>"root", "password"=>123, "socket"=>"/tmp/mysql.sock"}, charset: utf8, collation: utf8_unicode_ci

database.yml:

development:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: bd_development
  pool: 5
  username: root
  password: 123
  socket: /tmp/mysql.sock

How can solve this problem? please, help. Thank you

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