Linux系统CentOS-7下MySQL-5.7版本安装详细步骤

MySQL5.7版本在CentOS系统安装

1. 安装需要root权限

2. 配置yum仓库

   # 更新密钥
   rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql-2022
   
   # 安装Mysql yum库
   rpm -Uvh http://repo.mysql.com//mysql57-community-release-el7-7.noarch.rpm
   

3. 使用yum安装MySQL

   # yum安装Mysql
   yum -y install mysql-community-server
   

4. 启动MySQL并配置开机自启

   systemctl start mysqld		# 启动
   systemctl enable mysqld		# 开机自启
   

5. 检查MySQL运行状态

   systemctl status mysqld
   

6. 获取MySQL的初始密码

   # 通过grep命令，在/var/log/mysqld.log文件中，过滤temporary password关键字，得到初始密码
   grep 'temporary password' /var/log/mysqld.log
   

7. 登录MySQL

   mysql -uroot -p
   

8. 降低MySQL的密码安全级别

   set global validate_password_policy=LOW; # 密码安全级别低
   set global validate_password_length=4;	 # 密码长度最低4位即可
   

9. 修改root用户密码

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

10. 授权root远程登录

    # 授权root远程登录
    grant all privileges on *.* to root@"IP地址" identified by '密码' with grant option;  
    
    # 刷新权限，生效
    flush privileges;
    

11. 退出MySQL

    # 退出命令
    exit
    
    # 或者通过快捷键退出：ctrl + d
    

12. 检查端口

    netstat -anp | grep 3306