| XKILL(1) | General Commands Manual | XKILL(1) | 
xkill - kill a client by its X resource
xkill [-display displayname] [-id resource] [-button
  number] [-frame] [-all] [-version]
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. If no resource
  identifier is given with -id, xkill will display a special
  cursor as a prompt for the user to select a window to be killed. If a pointer
  button is pressed over a non-root window, the server will close its connection
  to the client that created the window.
  - -display displayname
- This option specifies the name of the X server to contact.
- -id resource
- This option specifies the X identifier for the resource whose creator is
      to be aborted. If no resource is specified, xkill will display a
      special cursor with which you should select a window to be kill.
- -button number
- This option specifies the number of pointer button that should be used in
      selecting a window to kill. If the word "any" is specified, any
      button on the pointer may be used. By default, the first button in the
      pointer map (which is usually the leftmost button) is used.
- -all
- This option indicates that all clients with top-level windows on the
      screen should be killed. Xkill will ask you to select the root
      window with each of the currently defined buttons to give you several
      chances to abort. Use of this option is highly discouraged.
- -frame
- This option indicates that xkill should ignore the standard conventions
      for finding top-level client windows (which are typically nested inside a
      window manager window), and simply believe that you want to kill direct
      children of the root.
- -version
- This option makes xkill print its version and exit without killing
      anything.
This command does not provide any warranty that the application whose connection
  to the X server is closed will abort nicely, or even abort at all. All this
  command does is to close the connection to the X server. Many existing
  applications do indeed abort when their connection to the X server is closed,
  but some can choose to continue.
  - Button
- Specifies a specific pointer button number or the word "any" to
      use when selecting windows.
X(7), xwininfo(1), XKillClient(3), XGetPointerMapping(3), KillClient in the X
  Protocol Specification
Jim Fulton, MIT X Consortium
Dana Chee, Bellcore