摘要：
删除DATA文件夹rm rf/var/lib/mysql，重新初始化并启动MYSQLmysqld--initialize--console--lower case table names=1 chown Rmysql:ALTERUSER'root'@'localhost'IDENTIFIEDBITHmysql_ native_passwordBY'tw369.com'；
删除DATA文件夹
rm -rf /var/lib/mysql
重新初始化并启动MYSQL
mysqld --initialize --console --lower-case-table-names=1
chown -R mysql:mysql /var/lib/mysql/
systemctl start mysqld
systemctl status mysqld
重新初始化登录帐户
vim /etc/my.cnf.d
--增加
skip-grant-tables
--退出后重启
systemctl stop mysqld
systemctl start mysqld
--开始重置密码
mysql -uroot -p --输入任意密码
--必须先执行 flush privileges，否则会报The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement
flush privileges;
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'tw369.com';
UPDATE USER SET host ="%" where user = "root";
flush privileges;
exit
启动服务
删除配置文件的 skip-grant-tables
systemctl restart mysqld