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Linux~CentOS上MySQL的安装教程

juneyale 2022-04-22 阅读 38

一、卸载MySQL

  1. 卸载系统自带的mariadb
    rpm -qa|grep mariadb
    rpm -e mariadb-libs --nodeps
    rpm -qa|grep mariadb
    
  2. 卸载MySQL
    systemctl stop mysqld.service
    rpm -qa | grep -i mysql  
    yum remove mysql-community-libs-5.7.29-1.el7.x86_64 mysql-community-common-5.7.29-1.el7.x86_64 mysql-community-client-5.7.29-1.el7.x86_64 mysql-community-server-5.7.29-1.el7.x86_64
    rpm -qa | grep -i mysql
    find / -name mysql
    
    在这里插入图片描述
    在这里插入图片描述
    rm -rf /etc/my.cnf
    rm -rf /var/log/mysqld.log
    

二、安装MySQL

  1. 创建MySQL目录
    mkdir /export/server/mysql
    
  2. 上传压缩包到该文件夹
    在这里插入图片描述
  3. 解压压缩包
    tar -xvf mysql-5.7.34-1.el7.x86_64.rpm-bundle.tar
    
  4. 执行安装
    yum -y install libaio
    rpm -ivh mysql-community-client-5.7.34-1.el7.x86_64.rpm mysql-community-common-5.7.34-1.el7.x86_64.rpm mysql-community-devel-5.7.34-1.el7.x86_64.rpm mysql-community-embedded-5.7.34-1.el7.x86_64.rpm mysql-community-embedded-compat-5.7.34-1.el7.x86_64.rpm mysql-community-embedded-devel-5.7.34-1.el7.x86_64.rpm mysql-community-libs-5.7.34-1.el7.x86_64.rpm mysql-community-libs-compat-5.7.34-1.el7.x86_64.rpm mysql-community-server-5.7.34-1.el7.x86_64.rpm
    

三、配置MySQL

  • 初始化

    mysqld --initialize
    
  • 更改所属组

    chown mysql:mysql /var/lib/mysql -R
    
  • 启动MySQL

    systemctl start mysqld.service
    
  • 查看生成的临时root密码

    cat  /var/log/mysqld.log
    
  • 登录MySQL

    mysql -uroot -p
    临时root密码
    
  • 修改root密码

    # 更新用户密码,设置为123456
    alter user user() identified by "123456";
    # 选择数据库
    use mysql;
    # 授权
    GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '123456' WITH GRANT OPTION;
    FLUSH PRIVILEGES; 
    
  • 查看、开启、关闭mysql服务

    # 查看mysql服务状态
    systemctl status mysqld
    # 关闭mysql服务
    systemctl stop mysqld
    # 查看mysql服务状态
    systemctl status mysqld
    # 开启mysql服务
    systemctl start mysqld
    # 查看mysql服务状态
    systemctl status mysqld
    
  • 设置开机自动启动

    systemctl enable mysqld
    
  • 查看是否设置成功

    systemctl list-unit-files | grep mysqld
    
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