I tested the autofs (automount) for Ubuntu 12.04 Server.

mkdir /incoming-nfs

chmod 777 /incoming-nfs

put the next line in to "/etc/auto.master"

/-    /etc/auto.incoming-nfs

put the next line in to "/etc/auto.incoming-nfs"

/incoming-nfs   -rw,soft,nfsvers=3   131.169.247.61:/data

and the last is:

change the timeout to 60 seconds if you want in "/etc/default/autofs"

restart the autofs "/etc/init.d/autofs restart"