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本文为大家介绍了*CentOS* 7 64位 安装 *MySQL5.7* 的详细步骤
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## 1、配置YUM源
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在[MySQL]官网中下载YUM源rpm安装包：http://dev.mysql.com/downloads/repo/yum/
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\# 下载mysql源安装包
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```
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shell> wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm
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```
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#安装mysql源
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```shell
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shell> yum localinstall mysql57-community-release-el7-8.noarch.rpm
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```
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检查mysql源是否安装成功
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```shell
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shell> yum repolist enabled | grep "mysql.*-community.*"
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```
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## 2、安装MySQL
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```shell
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shell> yum install mysql-community-server
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```
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## 3、配置默认编码为utf8 并且设置不区分大小写
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修改/etc/my.cnf配置文件，在[mysqld]下添加编码配置，如下所示：
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```mysql
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[mysqld]
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character_set_server=utf8
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init_connect='SET NAMES utf8'
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lower_case_table_names=1
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```
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## 4、启动MySQL服务
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```shell
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shell> systemctl start mysqld
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```
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## 5、开机启动
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```shell
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shell> systemctl enable mysqld
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shell> systemctl daemon-reload
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```
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## 6、修改root默认密码
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mysql安装完成之后，在/var/log/mysqld.log文件中给root生成了一个默认密码。通过下面的方式找到root默认密码，然后登录mysql进行修改：
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```shell
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shell> grep 'temporary password' /var/log/mysqld.log
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```
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查看到密码后用root登录修改密码
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```shell
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shell> mysql -uroot -p
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```
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```mysql
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mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass4!';
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```
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或者
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```mysql
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mysql> set password for 'root'@'localhost'=password('MyNewPass4!');
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```
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**注意**：mysql5.7默认安装了密码安全检查插件（validate_password），默认密码检查策略要求密码必须包含：大小写字母、数字和特殊符号，并且长度不能少于8位。否则会提示ERROR 1819 (HY000): Your password does not satisfy the current policy requirements错误
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## 7、创建数据库并添加远程登录用户
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默认只允许root帐户在本地登录，如果要在其它机器上连接mysql，必须修改root允许远程连接，或者添加一个允许远程连接的帐户，为了安全起见，我添加一个新的帐户：
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```mysql
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mysql> create database yamidb CHARACTER SET utf8 COLLATE utf8_general_ci;
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mysql> GRANT ALL PRIVILEGES ON yamidb.* TO 'yami'@'%' IDENTIFIED BY 'Yami@2019';
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```
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