原文：https://devops.profitbricks.com/tutorials/install-mysql-on-centos-7/
1.下载mysql
在mysql官网选择适合的mysql版本(Red Hat Enterprise Linux 7 / Oracle Linux 7 for this tutorial) 点击 Download 。
右键复制No thanks, just start my download.的链接。
sudo rpm -Uvh http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm
2.安装mysql
现在就可以用yum命令安装mysql了
yum -y install mysql-community-server
3.mysql的启动、重启、停止
systemctl start mysqld #启动mysql服务
systemctl restart mysqld #启动mysql服务
systemctl stop mysqld #停止mysql服务
systemctl enable mysqld #开机启动mysql服务
systemctl status mysqld #查看mysql服务运行状态
4. 初始化mysql
mysql_secure_installation#命令将帮你安全初始化mysql
Set root password? [Y/n] Y
Remove anonymous users? [Y/n] Y
Disallow root login remotely? [Y/n] Y
Remove test database and access to it? [Y/n] Y
Reload privilege tables now? [Y/n] Y
5.防火墙设置
MySQL listens on TCP port 3306 by default.
If the CentOS firewall is enabled, then a rule allowing access to the MySQL server on port 3306/tcp from host192.0.2.10 can be added.
firewall-cmd --permanent --zone=trusted --add-source=192.0.2.10/
firewall-cmd --permanent --zone=trusted --add-port=/tcp
firewall-cmd --reload
6.创建数据库用户
The following steps will describe creating a new database named appdb and granting the appuser full access to the new database.
Adjust the hostname from which the user will be connecting and password as necessary.
mysql> create database appdb;
mysql> grant all on appdb.* to 'appuser'@'localhost' identified by 'password';
mysql> quit