Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)

development:
  adapter: mysql2
  host: localhost
  username: root
  password: xxxx
  database: xxxx

mysqladmin variables | grep socket

| socket                                            | /tmp/mysql.sock                                                                                                        |

development:
  adapter: mysql2
  host: localhost
  username: root
  password: xxxx
  database: xxxx
  socket: /tmp/mysql.sock

development:
  adapter: mysql2
  host: 127.0.0.1
  username: root
  password: xxxx
  database: xxxx

shell> sudo /Library/StartupItems/MySQLCOM/MySQLCOM start
 (ENTER YOUR PASSWORD, IF NECESSARY)
 (PRESS CONTROL-D OR ENTER "EXIT" TO EXIT THE SHELL)

shell> cd /usr/local/mysql
 shell> sudo ./bin/mysqld_safe
 (ENTER YOUR PASSWORD, IF NECESSARY)
 (PRESS CONTROL-Z)
 shell> bg
 (PRESS CONTROL-D OR ENTER "EXIT" TO EXIT THE SHELL)

development:
  adapter: mysql2
  host: localhost
  username: root
  password: xxxx
  database: xxxx
  socket: /Applications/MAMP/tmp/mysql/mysql.sock

staging:
  adapter: mysql2
  host: 127.0.0.1
  username: root
  password: xxxx
  database: xxxx
  socket: your-location-socket

mysqladmin variables | grep socket

mysqladmin: connect to server at 'localhost' failed
error: 'Can't connect to local MySQL server through socket '/Applications/XAMPP/xamppfiles/var/mysql/mysql.sock' (2)'
Check that mysqld is running and that the socket: '/Applications/XAMPP/xamppfiles/var/mysql/mysql.sock' exists!

mysql --help

socket: /tmp/mysql.sock

socket: /Applications/XAMPP/xamppfiles/var/mysql/mysql.sock

socket: /Applications/MAMP/tmp/mysql/mysql.sock

socket: /tmp/mysql.sock

socket: /var/mysql/mysql.sock

socket: /var/run/mysqld/mysql.sock

staging:
  # socket: /var/run/mysqld/mysql.sock

bundle exec rake redmine:plugins:migrate RAILS_ENV=production

development:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: difiuri_falcioni
  pool: 5
  username: root
  password:
  host: localhost
  socket: /Applications/XAMPP/xamppfiles/var/mysql/mysql.sock

sudo service mysqld restart