NFS mount on EA board

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Exporting a directory from the development host and mounting this directory eases the development process.

Configuration on devhost

In /etc/exports add this line per exported directory

directory hostname(options)

where directory is the directory you want to export to the net and the hostname is for instance an IP address of your EA board. The options can be rw,sync.



Change to suit your requirements.

You'll have to enable a few ports extra in the NFS configuration file: /etc/sysconfig/nfs

Remove the remarks (#) on the lines with these port numbers:


And every time you have changed in /etc/exports or other configuration files you have to reload nfs service.

/sbin/service nfs reload

Configure the firewall to allow NFS traffic to come through


Select Customize and set a star in the NFS4 field and add in the field for other ports the following ports:

111:tcp 111:udp 32803:tcp 32803:udp 32769:tcp 32769:udp 892:tcp 892:udp 662:tcp 662:udp

Ensure that nfs is running

$ service nfs stat
rpc.mountd is stopped
nfsd is stopped
rpc.rquotad is stopped

it is not - to start it issue

$ chkconfig --list|grep nfs
nfs             0:off   1:off   2:off   3:off   4:off   5:off   6:off
nfslock         0:off   1:off   2:off   3:on    4:on    5:on    6:off
$ chkconfig --level 345 nfs on
$ service nfs start                                                                                     
Starting NFS services:                                     [  OK  ]                                                                       
Starting NFS quotas:                                       [  OK  ]                                                                       
Starting NFS daemon:                                       [  OK  ]                                                                       
Starting NFS mountd:                                       [  OK  ]                                                                       
Stopping RPC idmapd:                                       [  OK  ]                                                                       
Starting RPC idmapd:                                       [  OK  ]

Test from bren

Provided you have included bren ( in your exports on the devhost you can check if your set-up is working correct by issuing this command on your bren login:

[klausk@bren ~]$  /usr/sbin/showmount -e
Export list for

Mount on the EA board

On the EA board issue this command:

mount -t nfs -o nolock,rsize=4096,wsize=4096 < source host>:< source export directory> <destination directory>

where the "< source host>" can be an IP address, the "< source directory>" is the directory that was exported from the development host and "<destination directory>" is the directory on where the exported directory shall be mounted.

Example: mount -t nfs -o nolock,rsize=4096,wsize=4096 /mnt

Centos 7

Edit the export files as shown above.

Edit the /etc/sysconfig/nfs ensuring the correct ports are used.

# TCP port rpc.lockd should listen on.
# UDP port rpc.lockd should listen on.

Open the the above ports in the firewall-config program.

Finally enable and start the nfs service

]$ systemctl enable nfs-server.service
]$ systemctl start nfs-server.service
]$ systemctl status nfs

On the remote add a line to /etc/fstab as described above and mount it

]$ mount -av

the -a instructs mount to (re)mount everything and the -v gives a verbose output.