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  • mysql8 修改root密码

    mysql8忘记了root密码,需要修改

    步奏:

    1. 从/etc/my.cnf 配置文件中加入skip-grant-table后正常登陆,把 localhost和user=root 的 authentication_string设置为空字符串

    # systemctl restart mysqld
    
    # mysql -u root -p
    mysql> use mysql;
    Reading table information for completion of table and column names
    You can turn off this feature to get a quicker startup with -A
    Database changed
    mysql> update user set authentication_string='' where user='root';
    mysql> select Host,User,authentication_string from user; +-----------+------------------+------------------------------------------------------------------------+ | Host | User | authentication_string | +-----------+------------------+------------------------------------------------------------------------+ | localhost | mysql.infoschema | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | | localhost | mysql.session | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | | localhost | mysql.sys | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | | localhost | root | | +-----------+------------------+------------------------------------------------------------------------+ 4 rows in set (0.00 sec)
    mysql> flush privileges;

    mysql> exit

    2. 把  skip-grant-table 去掉 重启mysql后,这时候 用空字符串可以登录mysql了

    # systemctl restart mysqld
    # mysql -u root -p
    mysql>

     3. 再修改密码

    mysql> alter user 'root'@'localhost'IDENTIFIED BY 'MyNewPas';
    
    mysql> flush privileges;

     修改完成.

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  • 原文地址:https://www.cnblogs.com/LoveDan/p/12444046.html
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