Setting up mysql-server-5.6 (5.6.25-0ubuntu0.15.04.1) ...
Installing new version of config file /etc/apparmor.d/usr.sbin.mysqld ...
Installing new version of config file /etc/init.d/mysql ...
Installing new version of config file /etc/init/mysql.conf ...
Installing new version of config file /etc/logrotate.d/mysql-server ...
Installing new version of config file /etc/mysql/debian-start ...
2015-10-07 10:32:08 0 [Warning] Using unique option prefix key_buffer instead of key_buffer_size is deprecated and will be removed in a future release. Please use the full name instead.
2015-10-07 10:32:08 0 [Warning] options --log-slow-admin-statements, --log-queries-not-using-indexes and --log-slow-slave-statements have no effect if --slow-query-log is not set
2015-10-07 10:32:08 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
This may be the relevant log entry:
Setting up mysql-server-5.6 (5.6.25- 0ubuntu0. 15.04.1) ... d/usr.sbin. mysqld ... mysql.conf ... d/mysql- server ... debian- start ... admin-statement s, --log-queries- not-using- indexes and --log-slow- slave-statement s have no effect if --slow-query-log is not set defaults_ for_timestamp server option (see documentation for more details).
Installing new version of config file /etc/apparmor.
Installing new version of config file /etc/init.d/mysql ...
Installing new version of config file /etc/init/
Installing new version of config file /etc/logrotate.
Installing new version of config file /etc/mysql/
2015-10-07 10:32:08 0 [Warning] Using unique option prefix key_buffer instead of key_buffer_size is deprecated and will be removed in a future release. Please use the full name instead.
2015-10-07 10:32:08 0 [Warning] options --log-slow-
2015-10-07 10:32:08 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_