Dell PowerVault 720N Command Reference Manual page 192

trusted-hosts (adminhost,,)
untrusted-hosts (red,,) (blue,,) (green,,)
all-hosts trusted-hosts untrusted-hosts
/vol/vol0 -access=trusted-hosts,root=adminhost
/vol/vol0/home -access=all-hosts,root=adminhost
exportfs
netgroup.time
@mntdir=/tmp/nac_etc_mnt_$$$$;\
if [ ! -d $$mntdir ]; then rm -f $$mntdir; mkdir $$mntdir; fi;\
for filer in filer1 filer2 filer3 ; do \
mount $$filer:/vol/vol0/etc $$mntdir;\
mv $$mntdir/netgroup $$mntdir/netgroup.bak;\
cp /etc/netgroup $$mntdir/netgroup;\
umount $$mntdir;\
done;\
rmdir $$mntdir