ISP Manager Business: First steps:

systemctl disable named.service;\
systemctl disable mysql.service;\
systemctl enable pdns.service;\
systemctl enable mariadb.service;\
ln -sv /usr/local/mgr5 /panel;\
ln -sv /usr/share/spamassassin /etc/spamassassin;\
mkdir /etc/old.mysql-configs; cp -pRv /etc/my.cnf* /etc/old.mysql-configs/