ubuntu下 mysql安装以后无法登陆的的解决方法（(ERROR 1698 (28000): Access denied for user 'root'@'localhost')）

1. 删除mysql

sudo apt-get autoremove --purge mysql-server-5.0

sudo apt-get remove mysql-server

sudo apt-get autoremove mysql-server

sudo apt-get remove mysql-common

 

2. 清理残留数据

dpkg -l |grep ^rc|awk '{print $2}' |sudo xargs dpkg -P

 

3. 安装 mysql

sudo apt-get install mysql-server

sudo apt-get install mysql-client

 

4 解决普通用户无法登录的问题：

sudo mysql -u root -p

select user, plugin from mysql.user;

update mysql.user set authentication_string=PASSWORD('newPwd'), plugin='mysql_native_password' where user='root';

flush privileges;

exit

重新进入