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