10-01-2007
and nfs share of rw isn't necessarily dangerous, as it may be appropriate for clients to write to servers. the user/group/read/write/execute attributes are still respected, however you need to confirm that there is a one to one mapping for uids and gids between server and all clients.
the "root=" means that the root from server chrome will be allowed root access to this share. This would typically be used for diskless clients.
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###############################################
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LEARN ABOUT FREEBSD
exportfs
exportfs(1B) SunOS/BSD Compatibility Package Commands exportfs(1B)
NAME
exportfs - translates exportfs options to share/unshare commands
SYNOPSIS
/usr/sbin/exportfs [-aiuv] [-o options] [pathname]
DESCRIPTION
exportfs translates SunOS 4.x exportfs options to the corresponding share/unshare options and invokes share/unshare with the translated
options.
With no options or arguments, exportfs invokes share to print out the list of all currently shared NFS filesystems.
exportfs is the BSD/Compatibility Package command of share(1M) and unshare(1M). Use share(1M)/ unshare(1M) whenever possible.
OPTIONS
-a Invokes shareall(1M), or if -u is specified, invokes unshareall(1M).
-i Ignore options in /etc/dfs/dfstab.
-u Invokes unshare(1M) on pathname.
-v Verbose.
-o options Specify a comma-separated list of optional characteristics for the filesystems being exported. exportfs translates options
to share-equivalent options. (see share(1M) for information about individual options).
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWnfssu |
+-----------------------------+-----------------------------+
SEE ALSO
share(1M), shareall(1M), unshare(1M), unshareall(1M), attributes(5)
SunOS 5.10 6 Nov 2000 exportfs(1B)