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

yum -y install mysql-community-server

systemctl status mysqld.service

systemctl start mysqld.service

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

# 进入mysql,使用上一步获取到的初始密码
mysql -uroot -p

# 修改密码
alter user ‘root‘@‘localhost‘ identified by ‘new password‘;

# 若密码设置过于简单违反密码设置规范,需要修改响应的规范
set global validate_password_policy=0;
set global validate_password_length=1;

# 修改密码规则
use mysql;
set global validate_password_policy=low; # 设置low后,只会验证密码长度
set global validate_password_length=5;  # 密码长度最小设置为5

yum -y remove mysql57-community-release-el7-10.noarch

vim /etc/my.cnf

# 配置文件中添加以下配置
[mysqld]
character-set-server=utf8
collation-server=utf8_general_ci
log-error=/var/log/mysqld.log
[client]
default-character-set=utf8
[mysql]
default-character-set=utf8

systemctl restart mysqld

# 创建数据库
create database db1 charset=utf8mb4;
use db1;

# 创建用户
create user ‘root‘@‘localhost‘ identified by ‘admin‘;

# 创建远程连接用户并赋予权限
grant all privileges on *.* to root@‘%‘ identified by ‘admin‘;
# 刷新权限
flush privileges;

# 移除权限
revoke all privileges on *.* from root@‘%‘;
# 刷新权限
flush privileges;