# 1 copy orgin data dir of mysql to new one cp -R /var/lib/mysql /mysqldata
chown mysql:mysql -R /mysqldata # 2 modify configure files, search for datadir in file /etc/mysql/my.cnf #datadir = /var/lib/mysql
datadir = /mysqldata # 3 modify configure files, search in file /etc/apparmor.d/usr.sbin.mysqld # /var/lib/mysql/ r,
# /var/lib/mysql/** rwk,
/bmysqldata/ r,
/mysql_data/** rwk, # 4 restart your service service mysql restart