mysqldump: Got error: 2002: "Can't connect to local MySQL server through socket '/run/mysqld/mysqld.sock' (2)" when trying to connect

Question

I'm trying to export my wordpress database with php wp-cli.phar db export but I get this error

mysqldump: Got error: 2002: "Can't connect to local MySQL server through socket '/run/mysqld/mysqld.sock' (2)" when trying to connect

After looking for answer I've tried to start mysql.service with sudo systemctl start mysql but it isn't found

Failed to start mysql.service: Unit mysql.service not found.

I also tried to start mariadb.service with sudo systemctl start mariadb but it wouldn't work

Job for mariadb.service failed because the control process exited with error code.
See "systemctl status mariadb.service" and "journalctl -xe" for details.

I can't find answer on how to solve these errors can someone help me ?