Hi valley,
I can't create the symlink or i don't know how to do it, but i try other solution and...........IT WORKS!!!
in mariadb my.cnf file i changed to absolute path of the pid file, in my case /var/lib/mysql/mysqld/mysqld.pid
And after that i just move the /etc/mysql/my.cnf to /etc/mysql/my.cnf.backup and all works as expected, ii reboot machine and mariadb started with no issues.
Sorry, but i'm just started to working in Linux server program 7 days ago...
Now my installations of Wordpress and magento enterprise are flying....
Thank you,
Pedro