Notes
How to force MySQL server to use unicode
$ sudo -s
# echo "[mysqld]
collation_server=utf8_unicode_ci
character_set_server=utf8
skip-character-set-client-handshake
" > /etc/mysql/conf.d/utf8.cnf
# /etc/init.d/mysql restart
# exit
$ sudo -s
# echo "[mysqld]
collation_server=utf8_unicode_ci
character_set_server=utf8
skip-character-set-client-handshake
" > /etc/mysql/conf.d/utf8.cnf
# /etc/init.d/mysql restart
# exit