service mysqld start
修改root的密码
mysqladmin -u root password ‘newpassword‘ 更改密码
mysql -u root -p 登录数据库
mysql> DROP DATABASE test; 删除test数据库
mysql> DELETE FROM mysql.user WHERE user = ‘‘; 删除匿名帐户
mysql> FLUSH PRIVILEGES; 重载权限
添加mysql用户：GRANT ALL PRIVILEGES ON my_db.* TO ‘user‘@‘localhost‘ IDENTIFIED BY ‘password‘;
# sudo service mysqld restart 重启服务
# sudo service mysqld stop 关闭服务
/etc/rc.d/init.d/mysqld status 查看mysql状态
# sudo chkconfig --del mysqld 删除服务清单中mysql服务
chkconfig --list 察看mysql是否在自动启动列表中
#sudo /etc/init.d/mysqld start 启动mysql服务
#sudo /etc/init.d/mysqld stop 关闭mysql服务
#sudo /etc/init.d/mysqld restart 重启mysql服务
原文：http://my.oschina.net/DCode/blog/299204