you would like to forget all those nano and complicated things about Linux for installations:
You may use my installer :
Here guys I made what I want for the logins / password, as example (not instlling ldap), for samba and nfs:
# in case: sudo apt-get install xdialog
It is a beta version, and you have no warranties
The /etc/exports has to be verified by a geek. And if we are very lucky, he'll improve the scripts.