booting sequence of graphical mode in linux
 

i know that when system boots its sequence is
"init-getty-login-password-bash"
getty calls the login program whose location is /bin/login
but it is only for cli mode can anybody tell me where is login program for graphical mode of linux

Hello,
the "login program for graphical mode" is usually a Display Manager like XDM (X Display Manager), GDM (Gnome Display Manager), KDM (KDE ...), or other...
It is (usually) started last by the init scripts, in /etc/init.d/ (see in /etc/rc2.d/)