Comments - Specifying Permissions for Schema (Data) Directories and Tables
Content reproduced on this site is the property of its respective owners,
and this content is not reviewed in advance by MariaDB. The views, information and opinions
expressed by this content do not necessarily represent those of MariaDB or any other party.
Please explain why one would ever need to change the permissions.
Also, shouldn't the 'user' and 'group' be mentioned whenever discussing unix permissions.
There are some scenarios out there - see for example http://kedar.nitty-witty.com/blog/umask-umask_dir-changing-mysql-file-dir-permissions