Useful Things You Can Do with FVWM
Sometimes one wants to temporarily reconfigure FVWM, perhaps to test the effect of some configuration command. One way to do this is to modify the config file and then restart FVWM. You probably will find, depending, of course, on how your FVWM is configured, that if you click on the root window, you get a menu containing the option Restart FVWM. This is a little tedious, however. Maneuvering the mouse to the root window, clicking on it and choosing the option to restart FVWM takes time, particularly if the root window is completely obscured by windows. And the restart of FVWM takes a significant fraction of a second. There's a better and faster way--the program FvwmCommand, which comes packaged with FVWM.
FvwmCommand can perform a number of functions. We're only interested in one function, however: sending commands to FVWM. Sending commands is a simple task: one simply runs FvwmCommand command_to_send. For example, the command to restart FVWM is called Restart, so to restart FVWM, one only need give the command FvwmCommand Restart at the shell prompt.
In order for FvwmCommand to work, it needs to talk to FVWM. It doesn't do so directly, however; instead, it does so through an intermediary, called FvwmCommandS. FvwmCommandS is an FVWM module, which is a program started by FVWM that communicates with it by means of a special protocol.
The best way to get FVWM to start FvwmCommandS is to put a command to this effect in FVWM's config file. The command to use is Module, and it takes as its argument the name of the module to start. So in this case, the full command is Module FvwmCommandS. Once you've put this command into the FVWM config file and restarted FVWM, you should find that FvwmCommand works for you.
Ronan McGoran is a UNIX system administrator. His home page can be found here.
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