[root@database-rhel79 my.cnf.d]# mysql -u root
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 9
Server version: 10.4.18-MariaDB MariaDB Server
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]> set global wait_timeout=2592000;
Query OK, 0 rows affected (0.001 sec)
MariaDB [(none)]> set wait_timeout=2592000;
Query OK, 0 rows affected (0.001 sec)