centos7下安装Mysql

1.首先先将centos7自带的mariadb删除.,使用命令查看自带的mariadb

rpm -qa | grep mariadb

2.删除有关mariadb的文件

命令：rpm -e --nodeps +文件名

3.更新软件

yum update

yum -y install wget

4.下载和安装仓库

wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm

sudo rpm -ivh mysql-community-release-el7-5.noarch.rpm

yum update

5.安装启动mysql

yum install mysql-server

systemctl start mysqld

6.配置mysql

mysql_secure_installation

提示输入密码   初始密码为null  回车即可设置新密码

7.开启远程登录  （用root用户登录mysql）

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'root';

FLUSH PRIVILEGES;

8.开放3306端口

irewall-cmd --zone=public --add-port=3306/tcp --permanent

firewall-cmd --reload