HD Install :: shudown -f now

With dsl 3.0 in a frugal install, I used to shutdown the machine through cron with a sudo shutdown -f now
As it does not work with DSL 3.3 I have just tried to do it in an Xterm.
After that, the Xserver is still working, I can launch a new Xterm, but no keypress on the keyboard is taken into account.
Then the only way out is a reboot through the DSL menu.
Why?
By the way, where should I look to find out how that reboot is performed (where is the file describing the content of the DSL)?

See manpages (or info pages, etc.): "Skip fsck on reboot."
That's all it does if you only specify -f (though I think this would only apply to traditional/debian/full hd-installs)

So if you want to turn off the machine, you'll want to specify -h as well, or use halt afterwards.

An easy way to see DSL's scripts is to check the text file ~/.fluxbox/menu

original here.