MySQLのrootパスワードを変更したい

とりあえずmysqlを止める

service mysql stop

safeモードで起動する

/usr/bin/mysqld_safe  --skip-grant-tables

password無しでログインできるようになる

mysql -u root

アップデートをかける

$ UPDATE mysql.user SET Password=PASSWORD('1234') WHERE User='root';
$ FLUSH PRIVILEGES;

mysql起動

$ mysql.server restart

確認

$ mysql -uroot -p
Enter password: 1234
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 6
Server version: 5.5.49-0ubuntu0.14.04.1 (Ubuntu)

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