sdm - starts X server and sdm-login
       sdm [--xserver <x_server>] [<xserver_options>]
       starts an X(7) server and runs the sdm-login(8) program via xinit(1).
       --xserver <x_server>
              specify  the  X  server  to  use.  default value can be found in
              /etc/sdm/sdm.config
       /etc/sdm/sdm.config
       does not respond properly to kill signals.
       Vagrant Cascadian <vagrant@freegeek.org>
       sdm-login(8), X(7), xinit(1)