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In this case, after the directory is called out in a line, we're also setting which 
network is able to access them (
192.168.1.0
/
255.255.255.0
 in our case). This means 
that if you're connecting from a different network, your access will be denied. Each 
connecting machine must be a member of the 
192.168.1.0/24
 network in order 
to proceed (so make sure you change this to match your IP scheme). Finally, we 
include some options for each export, for example, 
rw,no_subtree_check
.
As far as what these options do, the first (
rw
) is rather self-explanatory. Here, we 
can set whether or not other nodes will be able to make changes to data within the 
export. In the examples I gave, the 
/documents
 export is read-only (
ro
), while the 
others allow read and write.
The next option in each example is 
no_subtree_check
. This option is known to 
increase reliability and is mainly implied by default. However, not including it may 
make NFS complain when it restarts, but nothing that will actually stop it from 
working. Particularly, this option disables what is known as