Mysql数据库登录及密码修改

Posted 2021-12-10 mingyuewu

mysql数据库登录及修改密码

1 登录

mysql  -h127.0.0.1 -P3308  -uroot -p 

#输入密码

2 修改密码

set password for root@localhost='123456';
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY "123456";
flush privileges;

3 修改密码安全等级

set global validate_password_policy=0;
set global validate_password_length=1;

4 忘记密码时登录mysql

#关闭mysql，修改配置文件让mysql允许无密码登录，再重启Mysql
systemctl  stop  mysqld 
#跳过授权表启动MySQL服务程序
vim  /etc/my.cnf
...
[mysqld]
skip_grant_tables=1
...
systemctl start  mysqld

直接输入mysql 登录
update mysql.user set authentication_string=password('123456')   where user='root' and host='localhost';
FLUSH PRIVILEGES;   
exit