centos mysql忘记密码，修改密码
1.修改配置文件my.cnf
[root@localhost ~]# vi /etc/my.cnf
找到mysqld在之后添加
skip-grant-tables
保存退出
2. 重启mysql服务(必须重启后才能不需要密码进入)
systemctl restart mysqld
3.直接登陆mysql而不需要密码
mysql -u root (直接点击回车)
4.在mysql中输入
use mysql;
update user set authentication_string='admin1234' where user='root';
显示下面信息
Query OK, 2 rows affected (0.00 sec)
Rows matched: 2 Changed: 2 Warnings: 0
5.执行 flush privileges;
6.退出mysql ，到my.cnf中把开始添加的skip-grant-tables去掉
7.重启mysql服务 systemctl restart mysqld
8.重新进入 mysql -u root -p
用修改的密码还是进入不了
[root@iZwz9env7nl3mi5mxx7yp6Z ~]# mysql -u root -p
Enter password:
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)