Linux: How to Kill X windows halted, frozen or resource eating application

Q. How do I kill X windows (or application) that is not die from local or remote X sever? A. You need to use xkill command. It kills a client by its X resource and not by process ID. For example, your application may not be responding kill request. Even if you try to kill you see application window. xkill is a utility for forcing the X server to close connections to clients. This program is very dangerous, but is useful for aborting programs that have displayed undesired windows on a user's screen. Just type command xkill $ xkill And click on application which you want to abort forcefully or select the window/application whose client you wish to kill with button 1.