After configuring the Xconfig file, you can start the server with the startx command. There are a few things to take into consideration first, however.
Make sure that the directory /usr/bin/X11 is on your path. This directory contains all of the X binaries and the server itself.
Secondly, the X server requires a free VC to enable VC
switching.
In other words, you must have one of your VC's available, with no
login process running on it. The easiest way to ensure this is
to edit /etc/inittab and delete one of the getty lines which
starts up a login process on each VC. In my inittab, for example,
I run getty on /dev/tty1 through /dev/tty7 (that is, VC's
1 through 7), but not on /dev/tty8.
When running startx, the file $HOME/.xinitrc is read. This file is a shell script which contains commands to run after the X server is started. If this file doesn't exist, the file /usr/lib/X11/xinit/xinitrc is used as a system-wide default instead. You can use this default file as a sample .xinitrc file.
Using X Windows is a large topic, and we won't try to cover it here. Read The X Window System User's Guide, or another book on using X, for details. See Appendix A information on this book.