mysql -u rootmysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD('newpass');

mysqladmin -u root password "newpass"

mysqladmin -u root password oldpass "newpass"

mysql -u rootmysql> use mysql;mysql> UPDATE user SET Password = PASSWORD('newpass') WHERE user = 'root';mysql> FLUSH PRIVILEGES;

mysqld_safe --skip-grant-tables&mysql -u root mysqlmysql> UPDATE user SET password=PASSWORD("new password") WHERE user='root';mysql> FLUSH PRIVILEGES;