Linux中yum安装MySQL及卸载_yum -y module disable mysql

MySQL安装

1. 先下载mysql的repo源

   wget -i -c http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm

2. yum安装mysql源包

   yum -y install mysql57-community-release-el7-10.noarch.rpm

3. 安装MySQL

   1. 用yum module disable mysqL先禁用本地的 MySQL 模块

      yum module disable mysql

   2. 安装mysql

      yum -y install mysql-community-server

4. 启动MySQL

   systemctl start  mysqld.service

5. 查看MySQL初始密码

   grep "password" /var/log/mysqld.log

6. 登录数据库

   mysql -uroot -p

7. 修改MySQL默认密码

   1. 修改密码安全策略为低（只校验密码长度，至少8位）

      set global validate_password_policy=0;

   2. 修改密码

      ALTER USER 'root'@'localhost' IDENTIFIED BY '12345678';

8. 授予root用户远程管理权限

   GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '12345678';

9. 刷新数据库

   FLUSH  PRIVILEGES;

10. 退出数据库

    exit

MySQL卸载

1. 查看已安装的mysql

   rpm -qa | grep -i mysql

2. 卸载mysql

   1. 卸载mysql

      yum remove mysql-community-server-5.6.36-2.el7.x86_64

   2. 查看mysql的其它依赖：

      rpm -qa | grep -i mysql

3. //卸载依赖

   1. yum remove mysql-libs
   ​
   2. yum remove mysql-server
   ​
   3. yum remove perl-DBD-MySQL
   ​
   4. yum remove mysql