mysql 設置不了短串密碼怎么辦 You must reset your password using ALTER USER statement before executing this statement.

centos7+ 安裝 mysq 5.7 https://www.linuxidc.com/Linux/2016-09/135288.htm

 

set global validate_password_policy=0; 

set global validate_password_length=4;

 

再授權

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

 

初次安裝完使用后報：MySQL Packet for query is too large 

解決辦法：

1.首先在控制台查詢一下：SHOW VARIABLES LIKE '%max_allowed_packet%';

2.set global max_allowed_packet = 5*1024*1024*10;