How to use xkill command In Linux
For using xkill to kill the open window, just run the xkill command. Then your cursor will turn into an X sign. Then right-click on the windows which you have to kill.
xkill
How to kill processes on the Linux Desktop with xkill
xkill is a command-line utility that can kill the undesired windows on the user’s screen. Basically, xkill force the X server to close the connection to the client. This utility kills the programs without providing PID with a command. Now let’s see how to install the xkill on the systems.