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.. index:: nfs (filesystem)
.. _filesystems_nfs:
NFS Support
===========
barebox has readonly support for NFSv3 in UDP mode.
Example::
barebox:/ mount -t nfs 192.168.23.4:/home/user/nfsroot /mnt/nfs
The barebox NFS driver adds a ``linux.bootargs`` device parameter to the NFS device.
This parameter holds a Linux kernel commandline snippet containing a suitable root=
option for booting from exactly that NFS share.
Example::
barebox:/ devinfo nfs0
...
linux.bootargs: root=/dev/nfs nfsroot=192.168.23.4:/home/sha/nfsroot/generic-v7,v3,tcp
The options default to ``v3,tcp`` but can be adjusted before mounting the NFS share with
the ``global.linux.rootnfsopts`` variable
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