Page 182 - DCAP602_NETWORK_OPERATING_SYSTEMS_I

Network Operating Systems-I

notes One file system, /usr, has two lines specifying exports to the same host, client. The correct format
for this situation is:
/usr/src /usr/ports client
The properties of one file system exported to a given host must all occur on one line. Lines without
a client specified are treated as a single host. This limits how you can export file systems, but for
most people this is not an issue.
The following is an example of a valid export list, where /usr and /exports are local file
systems:
# Export src and ports to client01 and client02, but only
# client01 has root privileges on it
/usr/src /usr/ports -maproot=root client01
/usr/src /usr/ports client02
# The client machines have root and can mount anywhere
# on /exports. Anyone in the world can mount /exports/obj read-only
/exports -alldirs -maproot=root client01 client02

/exports/obj -ro
The mountd daemon must be forced to recheck the /etc/exports file whenever it has been
modified, so the changes can take effect. This can be accomplished either by sending a HUP
signal to the running daemon:

# kill -HUP `cat /var/run/mountd.pid`
or by invoking the mountd rc script with the appropriate parameter:
# /etc/rc.d/mountd onereload
Alternatively, a reboot will make FreeBSD set everything up properly. A reboot is not necessary
though. Executing the following commands as root should start everything up.
On the NFS server:
# rpcbind
# nfsd -u -t -n 4
# mountd -r

On the NFS client:
# nfsiod -n 4
Now everything should be ready to actually mount a remote file system. In these examples the
server’s name will be server and the client’s name will be client. If you only want to temporarily
mount a remote file system or would rather test the configuration, just execute a command like
this as root on the client:

# mount server:/home /mnt
This will mount the /home directory on the server at /mnt on the client. If everything is set
up correctly you should be able to enter /mnt on the client and see all the files that are on the
server.
If you want to automatically mount a remote file system each time the computer boots, add the
file system to the /etc/fstab file. Here is an example:
server:/home /mnt nfs rw 0 0

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