linux安装mysql

1. 安装Mysql

   • mysql yum 源下载

   • 使用wget下载,如centos7/mysql8.0

     wget https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm
     

   • 使用命令本地安装

     sudo yum localinstall mysql80-community-release-el7-3.noarch.rpm
     

   • 查看本地允许安装的mysql版本

     yum repolist enabled | grep "mysql.*-community.*"
     

   • 查看可安装的

     yum repolist all | grep mysql
     

   • 选择允许安装的

     # vim /etc/yum.repos.d/mysql-community.repo
     
     [mysql-cluster-7.5-community]
     name=MySQL Cluster 7.5 Community
     baseurl=http://repo.mysql.com/yum/mysql-cluster-7.5-community/el/7/$basearch/
     # 这里
     enabled=0
     gpgcheck=1
     gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
     

   • 再次查看允许安装的。

     [root@localhost sed]# yum repolist enabled | grep mysql
     !mysql-connectors-community/x86_64       MySQL Connectors Community          153
     !mysql-tools-community/x86_64            MySQL Tools Community               110
     !mysql80-community/x86_64                MySQL 8.0 Community Server          177
     

   • 安装mysql

      sudo yum install mysql-community-server
     

   • 启动

     sudo service mysqld start
     sudo service mysqld status
     

2. 配置Mysql

   • 第一次安装查看随机生成的密码

     sudo grep 'temporary password' /var/log/mysqld.log
     

   • 进入并修改密码

     mysql -uroot -p
     rename user 'root'@'localhost' to 'root'@'%';
     ALTER USER 'root'@'%' IDENTIFIED BY 'MyNewPass4!';
     

     • 密码默认是有限制的，即;包含英文大小写数字和特殊字符，不少于8位。

   • 修改启动绑定端口和ip

     vim /etc/my.conf
     [mysqld]
     port = 3306
     bind-address=0.0.0.0
     

   • 查看密码安全级别

     SHOW VARIABLES LIKE 'validate_password.%';
     # 修改值
     set @num=1;