X Mysql5.7忘记root密码及mysql5.7修改root密码的方法

Mysql5.7忘记root密码及mysql5.7修改root密码的方法

这篇文章主要介绍了Mysql5.7忘记root密码及mysql5.7修改root密码的方法的相关资料,需要的朋友可以参考下


关闭正在运行的 MySQL :


[root@www.woai.it ~]# service mysql stop

运行

[root@www.woai.it ~]# mysqld_safe --skip-grant-tables &

或者在  /etc/my.cnf 中增加参数 skip-grant-tables ,然后重启mysql数据库也可以


为了安全可以这样禁止远程连接:

[root@www.woai.it ~]# mysqld_safe --skip-grant-tables --skip-networking &

使用mysql连接server:

[root@www.woai.it ~]# mysql -p

更改密码:

mysql> update mysql.user set authentication_string=password('123qwe') where user='root' and Host = 'localhost';

*特别提醒注意的一点是,新版的mysql数据库下的user表中已经没有Password字段了

而是将加密后的用户密码存储于authentication_string字段


mysql> flush privileges;      #### 必须要进行这一步
mysql> quit;
修改完毕。重启


[root@localhost ~]# service mysql restart
然后mysql就可以连接了

但此时操作似乎功能不完全,还要alter user…


mysql> alter user 'root'@'localhost' identified by '123';
这样也可以:

mysql> set password for 'root'@'localhost'=password('123');


====================================================================================================================================================
密码不符合安全策略的问题:

但是可能会遇到报错,密码不符合安全策略,如下:
mysql> alter user 'root'@'localhost' identified by 'root';
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements


mysql> set global validate_password_length=4;
Query OK, 0 rows affected (0.00 sec)

mysql> set global validate_password_policy=0;
Query OK, 0 rows affected (0.00 sec)

mysql> alter user 'root'@'localhost' identified by 'root';
Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql> exit
Bye
[root@mysql-test183 ~]# systemctl restart mysqld
[root@mysql-test183 ~]# mysql -uroot -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 2
Server version: 5.7.31 MySQL Community Server (GPL)

Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.

mysql> 



====================================================================================================================================================
====================================================================================================================================================
====================================================================================================================================================
====================================================================================================================================================


重点给大家介绍下mysql 5.7 root密码修改

MySQL管理者密码设置或修改:

依据官方说明5.6以后版本,第一次启动时会在root目录下生产一个随机密码,文件名.mysql_secret。


[root@bright ~]# cat /root/.mysql_secret
# Password set for user 'root@localhost' at 2015-03-27 23:12:10
:Jj+FTiqvyrF
[root@bright ~]# cd /usr/local/mysql/bin/
[root@bright bin]# ./mysqladmin -u root -h localhost password '123456' -p
Enter password: #此行输入.mysql_secret里第二行内容


mysqladmin: [Warning] Using a password on the command line interface can be insecure.
Warning: Since password will be sent to server in plain text, use ssl connection to ensure password safety.
官方的方式,笔者无论是否使用--skip-grant-tables启动mysql都测试失败,亲们可以测试:


shell>mysql -uroot -p'password' #password即.mysql_secret里的密码
mysql>SET PASSWORD = PASSWORD('newpasswd');


旧版本,安装后ROOT无密码,按如下操作:

方法一:

shell>service mysqld stop #停止mysql服务
shell>mysqld_safe --skip-grant-tables & #以不启用grant-tables模式启动mysql
shell>mysql -uroot -p #输入命令回车进入,出现输入密码提示直接回车。
mysql>use mysql;
mysql>update user set password=PASSWORD("123456")where user="root"; #更改密码为 newpassord
mysql>flush privileges; #更新权限
mysql>quit #退出



方法二:


shell>service mysqld stop #停止mysql服务
shell>mysqld_safe --skip-grant-tables & #以不启用grant-tables模式启动mysql
shell>mysql -uroot -p #输入命令回车进入,出现输入密码提示直接回车。
mysql > set password for root@localhost = password('mysqlroot');

shell>service mysqld stop #停止mysql服务
shell>mysqld_safe --skip-grant-tables & #以不启用grant-tables模式启动mysql
shell>mysql -uroot -p #输入命令回车进入,出现输入密码提示直接回车。
mysql > set password for root@localhost = password('mysqlroot');



方法三:


shell>/path/mysqladmin -u UserName -h Host password 'new_password' -p
原文地址:https://www.cnblogs.com/chendian0/p/14078144.html