Preparing to unpack .../mysql-client-core-5.6_5.6.28-0ubuntu0.14.04.1_amd64.deb ...
Unpacking mysql-client-core-5.6 (5.6.28-0ubuntu0.14.04.1) over (5.6.27-2+deb.sury.org~trusty+1) ...
Preparing to unpack .../mysql-server-5.6_5.6.28-0ubuntu0.14.04.1_amd64.deb ...
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
mysql stop/waiting
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
Unpacking mysql-server-5.6 (5.6.28-0ubuntu0.14.04.1) over (5.6.27-2+deb.sury.org~trusty+1) ...
dpkg: error processing archive /var/cache/apt/archives/mysql-server-5.6_5.6.28-0ubuntu0.14.04.1_amd64.deb (--unpack):
 trying to overwrite '/usr/share/man/man1/innochecksum.1.gz', which is also in package mysql-server-core-5.6 5.6.27-2+deb.sury.org~trusty+1