To stop or disable Elasticsearch service on a Linux server, you must 'kill' the running process. It is accomplished by sending the process a SIGTERM request, which ends or terminates it. To start the shutdown process, you must first find the process identifier (PID) for the Elasticsearch service you want to stop. The Grep command can be used to quickly locate processes. If you want to find all Elasticsearch-related processes running on a server, use this command.