复制mysql>use mysql; mysql>update user set user="centos" where user="root"; (将mysql的程序root用户名修改成centos,防止root的网站模板服务密码被暴力破解) mysql>select Host,User,Password,Select_priv,Grant_priv from user; mysql>delete from user where user=; (删除user用户) mysql>delete from user where password=; (删除user用户) mysql>delete from user where host=; (删除user用户) mysql>drop database test; (删除默认的test数据库) mysql>flush privileges; (刷新mysql的b2b信息网缓存,内建让以上设置立即生效) mysql>quit; 1.2.3.4.5.6.7.8.9.云服务器提供商