NFS Server Configuration

You can configure the NFS server by editing the /etc/exports file. This
file is similar to the /etc/fstab file in that it is used to set the permissions
for the file systems being exported. The entries look like this:

Click here to view code image
/file/system yourhost(options) *.yourdomain.com(options)
192.168.0.0/24(options)

This shows three common clients to which to share /file/system. The
first, yourhost, shares /file/system to just one host. The second,
.yourdomain.com, uses the asterisk (*) as a wildcard to enable all hosts in
yourdomain.com to access /file/system. The third share enables all hosts
of the Class C network 192.168.0.0 to access /file/share. For security, it
is best not to use shares such as the last two across the Internet because all
data will be readable by any network the data passes by.

Table 23.1 shows some common options.

Table 23.1 /etc/fstab Options

OptionPurpose

rw Gives    read    and write   access

ro Gives    read-only   access

asyncWrites data    when    the server, not the client, feels   the need

sync Writes data    as  it  is  received

The following is an example of an /etc/exports file:

Click here to view code image

/etc/exports: the access control list for filesystems which may be

exported

to NFS clients. See exports(5).

/home/matthew 192.168.0.0/24(rw,no_root_squash)

This file exports (makes available) /home/matthew to any host in
192.168.0.* and allows users to read from and write to
/home/matthew.

After you have finished with the /etc/exports file, the following