MySQL 8.0.29 set and modify the default password

MySQL 8.0.29 set and modify default password

*Change password:

• When logging in, an error was reported because you did not set the initial password of root.

• The password is stored in encrypted form in the authentication_string field in the user table in the mysql database.

• Reference link:

  • MySQL 8.0 Setting and Modifying Default Password-Xiaoyao Canyon (icoa.cn)

• Do not change the password by

  sudo mysql -u root -p

  to log in directly.

Modification steps:

1. Modify mysqld.cnf

   sudo vim /etc/mysql/mysql.conf.d/mysqld.cnf

   *You can use code without vim.

   

   Add to this fileThe command "skip -grant-tables"

   allows you to log in without entering a password.

2. Restart mysql

   service mysql restart// Similarly, there are alsoservice mysql startservice mysql stop

3. Login to mysql

   mysql -u root -p

   You will be prompted for a password, but you won't need to enter it to log in.

4. Modify user table

   use mysql ;update user set authentication_string='' where user='root';//Modify the password property to empty.

   • The plugin field of root is

     

   • Remember flush privileges;

     update user set plugin='mysql_native_password' where user='root';

   • Change it to

     

   p>

   ALTER user 'root'@'localhost' IDENTIFIED BY 'whq2242';
   quit

• The password can now be changed.
• 

5. Comment out the one added in mysqld.cnf and restart mysql

6. You can log in normally.

   

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