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 will be able to log in without entering it.

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 to 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.

   

Let me introduce myself first. The editor graduated from Shanghai Jiaotong University in 2013. I worked in a small company and went to big factories such as Huawei and OPPO. I joined Alibaba in 2018, until now.I know that most junior and intermediate java engineers want to upgrade their skills, they often need to explore their own growth or sign up to study, but for training institutions, the tuition fee is nearly 10,000 yuan, which is really stressful.Self-learning that is not systematic is very inefficient and lengthy, and it is easy to hit the ceiling and the technology stops.Therefore, I collected a "full set of learning materials for java development" for everyone. The original intention is also very simple. I hope to help friends who want to learn by themselves but don't know where to start, and at the same time reduce everyone's burden.Add the business card below to get a full set of learning materials