Although Linux is considered to be a robust operating system that does not have many issues with applications, programs sometimes become unresponsive or fail to respond. When this happens, they can consume a great deal of system resources, and ultimately take down the entire system. These applications usually cannot be restarted automatically; however, as the process in question may still be running and will not get shut down completely, we need to use a command to terminate the process. When this happens, it is necessary to either restart the whole system or kill off the specific application process. Since restarting the entire system takes time and can create significant inconvenience for the clients, it is much easier to simply kill the process itself.