CentOS 7.5 install MySQL 8.0.27---yum

One 、 Create installation directory

mkdir /usr/local/mysql

Two 、 download mysql8.0

Switch mysql Catalog

cd /usr/local/mysql

download

 wget https://repo.mysql.com//mysql80-community-release-el7-1.noarch.rpm

3、 ... and 、 install mysql

Execution and installation

 yum -y localinstall mysql80-community-release-el7-1.noarch.rpm

yum install mysql-community-server

  Four 、 start-up mysql service

systemctl start mysqld

5、 ... and 、mysql Service starts automatically

systemctl enable mysqld
systemctl daemon-reload

6、 ... and 、 password

Get the default password

grep 'temporary password' /var/log/mysqld.log

Change Password

 ALTER USER 'root'@'localhost' IDENTIFIED BY ' Your password （ Include case 、 Numbers and special characters ）';

　 The password setting requirements here are strict , Otherwise, an error will be reported ;

　 If you think the password is too complicated , You can modify the limit parameters , View the limit parameter command

SHOW VARIABLES LIKE 'validate_password%';

Modify the order

set global validate_password.length=4;
set global validate_password.policy=LOW;
 wait , What to modify , According to your own needs 
validate_password_length   Total fixed length password ;
validate_password_dictionary_file  Specify the file path for password verification ;
validate_password_mixed_case_count   The whole password should contain at least large / The total number of lowercase letters ;
validate_password_number_count   The whole password must contain at least the number of Arabic numerals ;
validate_password_policy  Specify the strength verification level of the password , The default is  MEDIUM;

7、 ... and 、 Authorize remote login

Create user

CREATE USER 'root'@'%' IDENTIFIED BY ' The password set above ';

to grant authorization

 GRANT ALL ON *.* TO 'root'@'%' WITH GRANT OPTION;

8、 to update root password

It needs to be updated here root password , Otherwise, when you connect to the database, you will report 2058 error ;

ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY ' The password set above ';

9、 Port settings

Check the port

show global variables like 'port';

Modify the port

1、 edit /etc/my.cnf file   [[email protected] ~]# vi /etc/my.cnf  
2、 add to port=2032; 
3、 restart mysql [[email protected] ~]# /etc/init.d/mysqld restart