I can't find /etc/init.d/mysqld

Hello,

I have just install directadmin on debian 8.2 and i am facing this problem
http://help.directadmin.com/item.php?id=45

and when i try to stop mysql by command /etc/init.d/mysqld stop i got that error:

-bash: /etc/init.d/mysqld: No such file or directory

I don't know what or where is the problem?

Thank you.