See: http://kb.askmonty.org/en/error-symbol-not-defined
cp /var/lib/mysql /home/backup-mysql -Rfp apt-get remove mysql-common libmariadbclient16 libmysqlclient16 apt-get install mysql-server mysql-common mysql-client php5-mysql
For me, it's Ok, now.
See: http:// kb.askmonty. org/en/ error-symbol- not-defined
cp /var/lib/mysql /home/backup-mysql -Rfp
apt-get remove mysql-common libmariadbclient16 libmysqlclient16
apt-get install mysql-server mysql-common mysql-client php5-mysql
For me, it's Ok, now.