On Wed, 2012-09-19 at 07:37 +0000, Pietro Paolini wrote: > Hi all, > > > > How disable the X-Server temporary ? > > > > Thanks, > > Pietro. By switching the running level, resp. by stopping X. It depends to the display manager you're using and to the way your startup is handled. I suspect you're using init and GDM. As root try "/etc/init.d/gdm stop" without the "s. If this shouldn't work, google for Debian running level or Debian stop X etc..