这是 怎么回事？？？？？？

yttlovezxx

[root@yttlovezxx download]# rpm -q fvwm
fvwm-2.4.17-1
[root@yttlovezxx download]# switchdesk fvwm
Red Hat Linux switchdesk 3.9
Copyright (C) 1999-2001 Red Hat, Inc
Redistributable under the terms of the GNU General Public License
ERROR: FVWM not installed!
[root@yttlovezxx download]#
vi Xclient.fvwm

exec /usr/X11R6/bin/fvwm2
可是在/usr/X11R6/bin/里却找不到fvwm2