遇到的一些问题和解决方法：
1、修改mysql数据目录权限
https://blog.csdn.net/w410589502/article/details/53945499
https://www.wdlinux.cn/bbs/thread-57988-1-1.html
2、拷贝ibdata
http://www.voidcn.com/article/p-hkffrrsj-wk.html
3、修改密码
https://blog.csdn.net/lixiangminghate/article/details/80522646
4、启动报错一直提示无权限读取ibdata
https://www.itechlounge.net/2014/07/linux-mysql-innodb-operating-system-error-number-13-in-a-file-operation/
https://blog.csdn.net/h106140873/article/details/93874632
5、启动后无法select查询
https://blog.csdn.net/a516247181/article/details/84699902
6、迁移后修改max_connection不生效
https://blog.csdn.net/isoleo/article/details/51732687
7、迁移后部分服务SQL报错java.sql.SQLException: Out of resources when opening file ‘/var/tmp/#sql_5c87_0.MAI’ (Errcode: 24)
https://blog.csdn.net/Mount565/article/details/80842036
