A little trick is required for setting NFS server on top of /dev/shm. If we add a normal entry in /etc/export and them run
# exportfs -a
exportfs will give us a warning like this: exportfs: Warning: /dev/shm requires fsid= for NFS export
When we try to mount this NFS server, we may get a error message from mount: mount.nfs: access denied by server while mounting nfsserver:/dev/shm
How to solve this problem? Just add the option fsid=1 to the /dev/shm entry in /etc/exports:
and remember to execute
# exportfs -a again.
Then nfsserver:/dev/shm can be mounted in 10.0.0.1/24.