Preparing to unpack .../mysql-server-5.6_5.6.25-0ubuntu0.15.04.1_amd64.deb ...
Unpacking mysql-server-5.6 (5.6.25-0ubuntu0.15.04.1) over (5.6.25-0ubuntu0.15.04.1) ...
Processing triggers for man-db (2.7.0.2-5) ...
Processing triggers for systemd (219-7ubuntu6) ...
Processing triggers for ureadahead (0.100.0-19) ...
dpkg: error processing package libaio1:amd64 (--configure):
 package libaio1:amd64 is not ready for configuration
 cannot configure (current status `half-installed')
dpkg: dependency problems prevent configuration of mysql-client-core-5.6: