6.3.2  Custom image.

10 computers all with different host name but with the same domain name.  

The power sequence will power them on one by one with about half a second delay ( in case that matters ).  Once started 
the main machine will lauch software onto the other machines via on -f hostname ...

Normal if I do ls /net on a machine it will show all the machine but only the hostname part since the domain part is the
 same. Once in a while that won't work, ls /net/ will show the complete FQN, and obviously on -f hostname won't work 
because it doesnt seems to know about /net/hostname only but need /net/hostname.domain.

Why would that be?