现在MySQL 5.7之后新增了很多功能，其中最明显的就是密码增强的配置。
安装完MySQL 5.7之后默认是没有用户名密码的。
/etc/init.d/mysqld stop
mysqld_safe --skip-grant-tables &
如果此时不想被远程连接：mysqld_safe --skip-grant-tables --skip-networking &
然后就可以无密码登录了，接着修改密码
alter user ‘root‘@‘localhost‘ identified by ‘password‘;
|
不建议用此方法：否则后面会报ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement. #update mysql.user set authentication_string=password("password") where user="root"; |
killall mysqld
/etc/init.d/mysqld start
就可以用密码登录了
mysql -uroot -p
但是会发现
mysql> show variables like ‘%char%‘;
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
mysql> alter user ‘root‘@‘localhost‘ identified by ‘password‘;
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements
关闭MySQL强密码插件
修改MySQL的启动脚本
大约在132行位置修改
$exec --datadir="$datadir" --socket="$socketfile" --validate-password=OFF\
增加红色部分即可
service mysqld restart
mysql> alter user ‘root‘@‘localhost‘ identified by ‘password‘;
就OK了
总结：
- mysql.user表结构的更改原来password字段更改为authentication_string字段
- 新增validate-password插件不需要强密码的就关闭吧。生产环境不建议