MySQLのrootパスワードの変更

目的

1. 開発用でパスワードなしで接続したいとき
2. rootのパスワード変更したいとき

手順

$ mysql -uroot -p
Enter password:

mysql> use mysql
mysql> update user set password='' where User='root';
mysql> flush privileges;

$ mysql -uroot

出力結果

Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 19
Server version: 5.6.23 Homebrew

Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql>