The error means mysqld does not has the access rights to the directory.

Error message:

The error means mysqld does not has the access rights to the directory.

Tail/var/log/mysqld.log

151125 18:21:50 mysqld_safe starting mysqld daemon with databases from  /oradata/mysql151125 18:21:50 [Note] /usr/sbin/mysqld  (mysqld 5.5.46)   STARTING AS PROCESS 57423&NBSP, ..... 151125 18:21:50 [warning] can ' t create test file /oradata/mysql/ Dpi-xz-cloud-db-1.lower-test151125 18:21:50 [warning] can ' T create test file  /oradata/mysql/DPI-XZ-cloud-db-1.lower-test151125 18:21:50 [Note] Plugin  ' Federated '  is disabled.151125 18:21:50 innodb: the innodb memory heap is  disabled151125 18:21:50 InnoDB: Mutexes and rw_locks use GCC  atomic builtins151125 18:21:50 innodb: compressed tables use zlib  1.2.3151125 18:21:50 innodb: using linux native aio151125 18:21:50 innodb: initializing buffer pool, size = 4.0g151125 18:21:50  Innodb: completed initialization of buffer pool151125 18:21:50  innodb :  operating system error number 13 in a file operation. innodb: the error means mysqld does not have the access  Rights toinnodb: the directory. innodb: file name ./ibdata1innodb: file operation call:  ' Create '. Innodb: cannot continue operation.151125 18:21:50 mysqld_safe mysqld from  pid file /oradata/mysql/dpi-xz-cloud-db-1.pid ended

Solution: Setenforce 0

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The error means mysqld does not has the access rights to the directory.