install NFS server, prepare share directory:
$ sudo apt install nfs-kernel-server
$ sudo mkdir -p /tmp/mynfsdir
$ sudo chown nobody:nogroup /tmp/mynfsdir
edit /etc/exports, add the following line:
/tmp/mynfsdir ${CLIENT_IP}(rw,sync,no_subtree_check)
start NFS server:
$ sudo systemctl restart nfs-kernel-server
$ sudo mount -t nfs ${SERVER_IP}:/tmp/mynfsdir /tmp/mynfsdir