1.首先安装wget命令：
yum -y install wget
2.下载mysql
wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm
3.安装mysql-community-release-el7-5.noarch.rpm包
rpm -ivh mysql-community-release-el7-5.noarch.rpm
4.安装mysql
yum install mysql-server
如下图,表示安装成功
5.安装完毕后登录mysql修改密码
mysql -u root
会有如下报错
6.把/var/lib/mysql的拥有者改为当前用户：
sudo chown -R root:root /var/lib/mysql
7.启动mysql： systemctl start mysqld
设置开机启动：systemctl enable mysqld
systemctl daemon-reload
8.修改密码
$ mysql -u root mysql > use mysql; mysql > update user set password=password(‘123456‘) where user=‘root‘; mysql > exit; 9.需要更改权限才能实现远程连接MYSQL数据库
可以通过以下方式来确认：
root#mysql -h localhost -uroot -p
Enter password: ******
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 4 to server version: 4.0.20a-debug
Type ‘help;’ or ‘\h’ for help. Type ‘\c’ to clear the buffer.
mysql> use mysql; (此DB存放MySQL的各种配置信息)
Database changed
mysql> select host,user from user; (查看用户的权限情况)
mysql> select host, user, password from user; +-----------+------+-------------------------------------------+ | host | user | password | +-----------+------+-------------------------------------------+ | localhost | root | *4ACFE3202A5FF5CF467898FC58AAB1D615029441 | | 127.0.0.1 | root | *4ACFE3202A5FF5CF467898FC58AAB1D615029441 | | localhost | | | +-----------+------+-------------------------------------------+ 4 rows in set (0.01 sec)
由此可以看出，只能以localhost的主机方式访问。 解决方法： mysql> Grant all privileges on *.* to 'root'@'%' identified by '123456' with grant option; (%表示是所有的外部机器，如果指定某一台机，就将%改为相应的机器名；‘root’则是指要使用的用户名，) mysql> flush privileges; (运行此句才生效，或者重启MySQL) Query OK, 0 rows affected (0.03 sec)
再次查看。。
mysql> select host, user, password from user; +-----------+------+-------------------------------------------+ | host | user | password | +-----------+------+-------------------------------------------+ | localhost | root | *4ACFE3202A5FF5CF467898FC58AAB1D615029441 | | 127.0.0.1 | root | *4ACFE3202A5FF5CF467898FC58AAB1D615029441 | | localhost | | | | % | root | *4ACFE3202A5FF5CF467898FC58AAB1D615029441 | +-----------+------+-------------------------------------------+ 4 rows in set (0.01 sec)10.用第三方软件测试连接（切记:关闭防火墙）
来源：https://www.cnblogs.com/zhangjiahao/p/10995033.html