Linux安装MySQL(清华大学镜像源)

1.下载并安装MySQL官方的 Yum Repository

//下载 [root@localhost ~]# wget http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm //安装 [root@localhost ~]# yum -y install mysql57-community-release-el7-10.noarch.rpm 

2.更换repo仓库里的连接开源软件镜像站

 

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[mysql-connectors-community] name=MySQL Connectors Community baseurl=https://mirrors.tuna.tsinghua.edu.cn/mysql/yum/mysql-connectors-community-el7-$basearch/ enabled=1 gpgcheck=1 gpgkey=https://repo.mysql.com/RPM-GPG-KEY-mysql 
[mysql-tools-community]
 name=MySQL Tools Community
 baseurl=https://mirrors.tuna.tsinghua.edu.cn/mysql/yum/mysql-tools-community-el7-$basearch/
 enabled=1
 gpgcheck=1
 gpgkey=https://repo.mysql.com/RPM-GPG-KEY-mysql
 
[mysql-5.6-community]
 name=MySQL 5.6 Community Server
 baseurl=https://mirrors.tuna.tsinghua.edu.cn/mysql/yum/mysql-5.6-community-el7-$basearch/
 enabled=0
 gpgcheck=1
 gpgkey=https://repo.mysql.com/RPM-GPG-KEY-mysql
 
[mysql-5.7-community]
 name=MySQL 5.7 Community Server
 baseurl=https://mirrors.tuna.tsinghua.edu.cn/mysql/yum/mysql-5.7-community-el7-$basearch/
 enabled=1
 gpgcheck=1
 gpgkey=https://repo.mysql.com/RPM-GPG-KEY-mysql
 
[mysql-8.0-community]
 name=MySQL 8.0 Community Server
 baseurl=https://mirrors.tuna.tsinghua.edu.cn/mysql/yum/mysql-8.0-community-el7-$basearch/
 enabled=0//默认安装最新版本，因为自己要安装5.7，所有把enabled=1改成enabled=0
 gpgcheck=1
 gpgkey=https://repo.mysql.com/RPM-GPG-KEY-mysql
 

3.安装MySQL

 sudo yum install -y mysql-community-server

4.启动MySQL

sudo service mysqld start

5.查看MySQL服务状态

sudo service mysqld status

 

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6.初始化MySQL

查看初始化密码：
sudo grep 'temporary password' /var/log/mysqld.log

 

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使用初始密码进行登录：
mysql -u root -p

 

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初始化密码
ALTER USER 'root'@'localhost' IDENTIFIED BY '初始化密码';

7.设置MySQL密码策略

查询MySQL初始的密码策略

 SHOW VARIABLES LIKE 'validate_password%'; 

 

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修改密码验证强度

set global validate_password_policy=LOW; 

修改密码长度

set global validate_password_length=6; 

设置简单密码

ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';

8.设置MySQL远程连接，在sql里面设置

//这里设置登录密码和远程连接密码都是123456 GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '123456' WITH GRANT OPTION; //刷新权限 FLUSH PRIVILEGES; 

9.设置 MySQL开机启动

systemctl enable mysqld

设置3306端口开放

firewall-cmd --zone=public --add-port=3306/tcp --permanent //重启防火墙 firewall-cmd --reload //验证3306是否开放成功 firewall-cmd --zone=public --query-port=3306/tcp 

10.远程连接