/etc/X11/xinit/xinitrc is in xinit 1.3.4-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | #!/bin/sh
# /etc/X11/xinit/xinitrc
#
# global xinitrc file, used by all X sessions started by xinit (startx)
# invoke global X session script
. /etc/X11/Xsession
|