centos 安装mysql（yum方式）

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1.下载mysql源安装包

$ wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm

2.安装mysql源

$ yum localinstall mysql57-community-release-el7-8.noarch.rpm

3.检查mysql源是否安装成功

$ yum repolist enabled | grep “mysql.-community.”

4.安装MySQL

$ yum install mysql-community-server

5.启动MySQL服务并设置开机启动

$ systemctl start mysqld
$ systemctl enable mysqld
$ systemctl daemon-reload

6.端口开放

$ firewall-cmd --zone=public --add-port=3306/tcp --permanent
$ firewall-cmd --reload

7.修改root本地登录密码 查看mysql密码

$ grep ‘temporary password’ /var/log/mysqld.log

连接mysql

$ mysql -uroot -p

修改密码【注意：后面的分号一定要跟上】

mysql> ALTER USER ‘root’@‘localhost’ IDENTIFIED BY ‘新密码’;

或：

mysql> set password for ‘root’@‘localhost’=password(‘新密码’);

8.添加远程登录用户

mysql> GRANT ALL PRIVILEGES ON *.* TO '账户名'@'%' IDENTIFIED BY '密码' WITH GRANT OPTION;

9.如密码等级过高，可通过以下命令调整

set global validate_password_policy=0;