centos7安装mysql8.0

获取源

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

安装mysql 8.0

sudo yum --enablerepo=mysql80-community install mysql-community-server

• 启动服务service mysqld start
• 查看状态service mysqld status

• 查看临时密码grep "A temporary password" /var/log/mysqld.log
• 登陆mysql后输入临时密码即可mysql -u root -p

• 修改密码
  alter user 'root'@'localhost' identified by 'zxcv1234'

  • 这个@和两侧的单引号直接不要有空格，否则会报错语法有误

    ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘‘localhost’ identified by ‘zxcv1234’’ at line 1

  • 这个单引号也要注意，不要打成 Esc键下面的那个小点，否则报错语法有误

    ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ’localhost identified by zxcv1234’ at line 1

  • 疯狂提示我不符合规则，也执行不了其他的命令

    ERROR 1819 (HY000): Your password does not satisfy the current policy requirements
    

  • 查询资料得知默认的政策要求是 为 1

策略	规则
0 or LOW	Length
1 or MEDIUM	Length; numeric, lowercase/uppercase, and special characters
2 or STRONG	Length; numeric, lowercase/uppercase, and special characters; dictionary file

• 0 or LOW Length：密码任意，长度8位及以上
• 1 or MEDIUM Length; numeric, lowercase/uppercase, and special characters：表示的是数字、大小写字母、特殊字符，长度任意
• 2 or STRONG Length; numeric, lowercase/uppercase, and special characters; dictionary file：限制与 1 差不多，但是密码会通过字典检查，通俗的说太简单的密码无法通过

修改策略（这个为可选）

• 查询策略 show variables like 'validate_password.%';
• 修改策略 set global validate_password.policy=0，令密码任意，长度大于等于8