mysql Access denied for user ''@'localhost' to database

mysql Access denied for user ''@'localhost' to database

Access denied for user ''@'localhost' to database

安装Mysql后在终端输入mysql, mysql 成功启动，退出，再输入 mysqladmin -u root password XXXXX， 出现错误： mysqladmin: connect to server at 'localhost' failed error: 'Access denied for user 'root'@'localhost' (using password: NO)' 如先输入mysql,成功启动后输入use mysql,出现如下错误：Access denied for user ''@'localhost' to database 'mysql'  还有，输mysql可以，输mysql -u root就出错了： Access denied for user 'root'@'localhost' (using password: NO). The reason is: 是昨日更新ROOT密码时出错 update user set password = '123456' where user ="root" //这样写是错的，密码其实不是123456 应该为update user set password = password ('123456') where user = "root" 具体操作步骤： 关闭mysql: # service mysqld stop 然后: # mysqld_safe --skip-grant-tables（该命令完成后，可能终端不会提示输入下一命令，下面命令在新开的终端中实现） 启动mysql: # service mysqld start mysql -u root mysql> use mysql mysql> UPDATE user SET Password=PASSWORD('xxx') WHERE user='root'; mysql> flush privileges; mysql>\q