In Windows you can easily kill any task by pressing Ctrl+Alt+Del and bringing up the task manager. Linux running the GNOME desktop environment (i.e. Debian, Ubuntu, Linux Mint, etc.) has a similar tool that can be enabled to run exactly the same way.
Is there a task manager for Linux Mint?
As Damien said, it’s called System Monitor in your Mint menu. You may prefer xfce4-taskmanager .
Where is Task Manager in Linux?
You press Ctrl+Alt+Del to get to the task manager in Windows. This task manager shows you all the running processes and their memory consumption. You can choose to end a process from this task manager application. When you’re just starting out with Linux, you may look for a task manager equivalent on Linux as well.