Solve an error when migrating Mysql tables

We may copy the files under /var/lib/mysql when migrating Mysql tables.

But we may get following erros in mysql client:
mysql> select * from test;
ERROR 1017 (HY000): Can't find file: './testdb/test.frm' (errno: 13)

This is the issue of permission, you need to:
sudo chown -R mysql.mysql /var/server/mysql/testdb/

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A simple implementation of DTW(Dynamic Time Warping) in C#/python

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