完整填坑：Centos7安装Mysql

wget -i -c http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm

yum -y install mysql57-community-release-el7-10.noarch.rpm

wget http://dev.mysql.com/get/mysql57-community-release-el7-7.noarch.rpm

yum localinstall -y mysql57-community-release-el7-7.noarch.rpm

yum install -y mysql-community-server

rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql-2022

yum -y install mysql-community-server

systemctl start  mysqld.service

systemctl status mysqld.service

grep "password" /var/log/mysqld.log

mysql -uroot -p

ALTER USER 'root'@'localhost' IDENTIFIED BY 'new password';

SHOW VARIABLES LIKE 'validate_password%';

+--------------------------------------+--------+
| Variable_name                         | Value  |
+--------------------------------------+--------+
| validate_password_check_user_name    | OFF    |
| validate_password_dictionary_file     |        |
| validate_password_length             | 8      |
| validate_password_mixed_case_count    | 1      |
| validate_password_number_count       | 1      |
| validate_password_policy              | MEDIUM |
| validate_password_special_char_count | 1      |
+--------------------------------------+--------+
7 rows in set (0.01 sec)

mysql> set global validate_password.policy=0;
mysql> set global validate_password.length=1;

grant all privileges on *.* to 'root'@'%' identified by 'password' with grant option;

mysql> flush privileges;