CentOS minimal installs may not include libaio, which is required for XE...

Cookbook fails against a CentOS 6.5 minimal install -- database will not start (attempts result in an ORA-600), but no error is generated. Older installation instructions for Oracle XE reference the packages bc, libaio and flex. Adding libaio resolves the database start error -- so far no need for the flex package.

Reference:
http://warp11.nl/2011/07/update-oracle-xe-11g-r2-on-centos-6/