启动服务：
sudo /usr/local/MySQL/support-files/mysql.server start
停止服务：
sudo /usr/local/mysql/support-files/mysql.server stop
重启服务：
sudo /usr/local/mysql/support-files/mysql.server restart
修改密码：
首先停止服务
sudo /usr/local/mysql/support-files/mysql.server stop
cd /usr/local/mysql/bin/
sudo su
./mysqld_safe --skip-grant-tables &
回车后mysql自动重启
./mysql
FLUSH PRIVILEGES;
SET PASSWORD FOR 'root'@'localhost' = PASSWORD('新密码');
以上命令一行一行输入 至此 修改成功