MySQL单机版安装

准备环境：

CentOS 7.4 64位

关闭防火墙

关闭selinux

安装常用工具：

[root@localhost ~]# yum install -y vim tree wget

下载rpm：

[root@localhost ~]# wget https://repo.mysql.com//mysql57-community-release-el7-11.noarch.rpm

安装yum源：

[root@localhost ~]# yum install mysql57-community-release-el7-11.noarch.rpm

安装mysql：

[root@localhost ~]# yum install -y mysql-community-server

启动mysql：

[root@localhost ~]# systemctl start mysqld.service

检查mysql启动状态：

[root@localhost ~]# systemctl status mysqld.service

配置mysql开机自启动：

[root@localhost ~]# systemctl enable mysqld.service

第一次登录，获取mysql的root用户初始化密码：

[root@localhost ~]# grep 'temporary password' /var/log/mysqld.log

修改mysql的root用户的密码：

[root@localhost ~]# mysql -uroot -p

mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass4!';

常见问题：

1、ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.

需要使用ALTER USER修改密码。

2、ERROR 1819 (HY000): Your password does not satisfy the current policy requirements

密码的复杂度不符合要求。

密码策略：

MySQL's validate_password plugin is installed by default. This will require that passwords contain at least one upper case letter, one lower case letter, one digit, and one special character, and that the total password length is at least 8 characters.

yum安装的默认密码策略：至少包含一个大写字符、一个小写字符、一个数字、一个特殊字符，并且密码总长度至少是8个字符。