解决 ERROR 1045 (28000): Access denied for user '...

最近新装好的mysql在进入mysql工具时，老是有错误提示: # mysql -u root -p Enter password: ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO) 或者 # mysql -u root -p password 'newpassword' Enter password: mysqladmin: connect to server at 'localhost' failed error: 'Access denied for user 'root'@'localhost' (using password: YES)'  如今终于找到解决方法了。原本准备重装的，如今没必要了。 方法操做很简单，以下： # /etc/init.d/mysql stop # mysqld_safe --user=mysql --skip-grant-tables --skip-networking & # mysql -u root mysql mysql> UPDATE user SET Password=PASSWORD('newpassword') where USER='root' and host='root' or host='localhost';//把空的用户密码都修改为非空的密码就好了。 mysql> FLUSH PRIVILEGES; mysql> quit # /etc/init.d/mysqld restart # mysql -uroot -p Enter password: <输入新设的密码newpassword>