3. Understanding SID vs Service Name in Oracle: Programming Examples
   SID (System Identifier)Unique identifier: Each Oracle database instance has a unique SID.Database instance: Represents a running copy of the database software
4. Checking Service Status on Ubuntu
   systemctl status: This command lists all active services and their status. You can filter the output by specifying a partial service name
5. Fixing "mysql service fails to start/hangs up - timeout" Error on Ubuntu with MariaDB
   mysql: This refers to the MariaDB database management system. MariaDB is a popular open-source alternative to MySQL.service: In this context