CentOS 7 版本将MySQL数据库软件从默认的程序列表中移除，那么CentOS 7版本如何安装MySQL呢，本文将指导大家具体的方法。
以滴滴云DC2云主机上的操作为例，首先切换账户权限到root权限，登录CentOS 7 系统的云主机后输入：
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[dc2-user@didiyun dc2-user]# sudo su |
切换成root权限，然后执行下面的安装方法：
官网安装mysql-server方法：
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[root@didiyun dc2-user]# yum install -y wget |
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[root@didiyun dc2-user]# wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm |
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[root@didiyun dc2-user]# rpm -ivh mysql57-community-release-el7-8.noarch.rpm |
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[root@didiyun dc2-user]# yum install mysql-community-server -y |
启动MySQL
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[root@didiyun dc2-user]# systemctl start mysqld |
验证是否启动
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[root@didiyun dc2-user]# systemctl status mysqld |
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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[root@didiyun dc2-user]# grep 'temporary password' /var/log/mysqld.log 2018-05-23T09:24:03.800263Z 1 [Note] A temporary password is generated for root@localhost: p?iT>b?iv7st |
可以看到初始密码为 p?iT>b?iv7st，登录数据库：
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[root@didiyun dc2-user]# mysql -uroot -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g.Your MySQL connection id is 2Server version: 5.7.22Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> |
重新设置root密码
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mysql> set password for 'root'@'localhost'=password('Mypass12@'); |
为数据库设置远程连接
首先在防火墙规则中打开3306端口
设置MySQL
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mysql> grant all privileges on *.* to root@'%'identified by '123456'; |
如果是非root用户（mysql的root用户）远程登录，则要先创建用户
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mysql>create user 'username'@'%' identified by 'password'; |
然后再进行连接
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[root@didiyun dc2-user]#mysql -h <IP地址> -uusername -p Enter password: ****** Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 11 Server version: 5.6.39 MySQL Community Server (GPL) Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> |
