How to PREVENT NFS shares showing on clients?

Folks: Can someone clue me in as to how it is that our server's NFS shares are showing up automatically on Mac clients (under Network..) -- and how to prevent that from happening?
For various reasons of idiosyncratic mix of machines, OSes etc, our server has SMB shares set up for Windows and Mac clients which work just fine, plus some NFS shares for linux and particularly for ancient SGI. We don't want Macs interacting with the server via NFS, yet those shares show up consistently on the clients, and confuse the heck out of users.
How do set the Mac clients to not ever do anything NFS? (On the server I could limit NFS exports' to specific IP addresses, but that's a moving target and likely to cause more grief than help...).
Thanks,
Graham
Many Mac OS X (10.3.9) Many

Jeff: We absolutely do NOT want the Mac users to be using NFS at all for anything. If we get involved in that game then we have to manage assignment of UIDs and GIDs for Mac users, which then impacts on the UIDs and GIDs that they use within their own Mac file systems and things go downhill from there. As it stands, the Mac users apparently have some default UID/GID which happens not to correspond to a UID/GID with privileges beyond RO, hence they can see but can't edit (thank goodness) dirs and files that they think they should be able to. We haven't even investigated whether those default UID/GIDs are even consistent across Macs (which of course is a problem in its own right), or what. Anyhow, it's big hairball that's totally unnecessary and useless.
It appears to me that some apparatus in the Mac is gratuitously detecting, mounting (or automounting) the NFS shares that can be detected on the network. If I could just turn that off, I think we'd be where we want to be. I guess turning off the entire NFS protocol for Macs might be a separate way to go.
Must admit, I'm getting closer to doing this "right" -- limiting NFS access in the server exports to specific client IPs.. but that's going to be a mess also.
Graham

Similar Messages

How to reshare nfs through afp to clients?

So here's the setup I've got going on:
Solaris file server with NFS
Mac OS X Server 10.6 with OD
30 Mac OS X workstations
My questions is: how do I configure the Mac OS X Server to re-share the NFS storage from the Solaris server to auto-mount on the Mac client machines with AFP?
P.S. same setup works like a charm on the PCs through SMB.

Resharing NFS Mounts as AFP Share Points
http://docs.info.apple.com/jarticle.html?path=ServerAdmin/10.6/en/fse722ed35.htm l ( OSX Server 10.6 )
http://docs.info.apple.com/article.html?path=ServerAdmin/10.5/en/c2fs10.html ( OSX Server 10.5 )
And on the Linux/Solaris Server side, you have on your /etc/exports lines like this:
/home3 10.10.11.1(rw,fsid=0,insecure,no_root_squash,no_subtree_check,sync)
or
/home3 odserver.domain.com(rw,fsid=0,insecure,no_root_squash,no_subtree_check,sync)
but you could have that line too, showing the nfs server to the whole 30 workstations.
/home3 192.168.0.0/255.255.255.0(rw,fsid=0,insecure,no_root_squash,no_subtree_check,sy nc)
But in the best scenario, nfs servers are only visible to the OD server, which plays its role of pivot point.
All workstations connect and see only OD, not NFS Solaris servers.
I have Fedora 11 (NFSv3) and OS X 10.5 and 10.6, it works fine. On 10.7 it's another story.
it mounts the NFS share, it shares it as usual.
but the Workgroup Manager or OS X Client creates only Documents, Downloads, Library and Sites.
No Desktop, Movies, Music, Pictures, Public folders, it must certainly hang at Library folder. I've tested it with 10.7.0
If you list files ls -l on the NFS server
You will see that the folders created through 10.5 or 10.6 OSX Servers are owned by root. in 10.7 Server they are owned by nobody (id 65534).

How to prevent executing more than one client from a machine?

Hi all,
Currently I am doing a client server project in java. The client is java swing. There is a requirement to prevent executing more than one client from a machine.
Now I am relying on socket for this. I listen to a port, say 15000 and when the second session is started it would give an exception at the socket. I know that this a trivial method. Can anybody please suggest a better method. Also is it possible to bring focus to already executing client, if the user tries to execute the client program again in the same machine?
An early answer to this question is highly appreaciated.
Thanks in advance
SSM

Thanks for the suggestion, but I dont think we can use socket for this. And again if we use file for the same as you described, I think it would sometime create a some serious side effects. Suppose after one client session is invoked, the power goes off. In this case the client shut down is not in the normal sequence and hence we cannot remove the file programaticaly. This creates big problem when the user tries to run client again.
I am really interested to know, is there any standard way in java which can be used to achieve this. Also is it possible to give focus to already executing client program if the user tries to invoke the client again.
Thanks
SSM

[GIVEN UP]xmonad: How to prevent the resizing of floating clients?

Hi guys,
I was playing with xmonad. I am working on a laptop and at work I have a pretty large external display. My laptop screen is 1280x800 and my external screen is 1920x1200.
On workspace 8 I put my floating clients, skype, sonata ecc. I also use launchy to start new programs.
So what's the problem? When I put my workspace 8 on the big screen the clients display well and I don't have problems. But when I put workspace 8 on laptop screen all my floating clients are resized.
That's pretty annoying. It's worse with launchy. If I start launchy on big screen no problems. If I start it on laptop screen it is resized. What's strange is that if I start it again it is resized again. It keeps resizing the damn resized window. So after a while I have just a little small square on the screen.
Does someone know how to fix this thing? Is it possible to configure xmonad and make floating applications re-sizable only by me regardless the screen?
Last edited by ArchArael (2009-04-03 19:14:30)

The problem is not having floating windows. I have that. The problem is that the floating windows are resized when I switch workspaces on smaller screen.
If I start launchy on smaller screen I see it resized. Then if I press esc and start it again is even smaller. After I have started launchy a bunch of times on the smaller screen it is resized so much that I cannot see it any more. That's really annoying.
I would like to have fixed size for floating windows, regardless screen size. The floating windows should be re-sizable only by me...when I wish it. The window manager shouldn't manage the floating windows size. Is this possibile?
Thank you for the suggestion. I tried with the xmonad.hs on the page you provided but the problem still persists. Maybe you don't notice this strange xmonad's behavior because your screens have similar resolutions.
My laptop is 1280x800 and my external screen is 1920x1200. Well, switching workspaces on laptop screen resizes floating windows. I would like to prevent this. Lurking on web didn't provided any useful information so far. That's why I'm bothering my lovely arch community.
This is my xmonad.hs:
import XMonad
import System.Exit
import qualified XMonad.StackSet as W
import qualified Data.Map as M
main = xmonad $ defaultConfig
modMask = mod4Mask
, borderWidth = 2
, terminal = "terminal"
, normalBorderColor = "#cccccc"
, focusedBorderColor = "#8bcd00"
, manageHook = myManageHook
, keys = myKeys
myManageHook = composeAll
className =? "MPlayer" --> doFloat
, className =? "Gimp" --> doFloat
, className =? "Zenity" --> doFloat
, className =? "Skype" --> doFloat
, className =? "Sonata" --> doFloat
, className =? "Dialog" --> doFloat
, title =? "Gran Paradiso - Restore Previous Session" --> doFloat
, title =? "Close Firefox" --> doFloat
, title =? "Password Required" --> doFloat
, title =? "Downloads" --> doFloat
-- Key bindings. Add, modify or remove key bindings here.
myKeys conf@(XConfig {XMonad.modMask = modMask}) = M.fromList $
-- launch a terminal
[ ((modMask, xK_Return), spawn $ XMonad.terminal conf)
-- APPLICATION BINDINGS
-- launch gmrun
, ((modMask, xK_p ), spawn "gmrun")
-- XF86StandBy
, ((0, 0x1008ff10 ), spawn "sudo pm-suspend")
-- XF86AudioLowerVolume
, ((0, 0x1008ff11 ), spawn "amixer -q sset Master 5-")
-- XF86AudioMute
, ((0, 0x1008ff12 ), spawn "amixer -q sset Master mute")
-- XF86AudioRaiseVolume
, ((0, 0x1008ff13 ), spawn "amixer -q sset Master 5+")
-- close focused window
, ((modMask .|. shiftMask, xK_c ), kill)
-- Rotate through the available layout algorithms
, ((modMask, xK_space ), sendMessage NextLayout)
-- Reset the layouts on the current workspace to default
, ((modMask .|. shiftMask, xK_space ), setLayout $ XMonad.layoutHook conf)
-- Resize viewed windows to the correct size
, ((modMask, xK_n ), refresh)
-- Move focus to the next window
, ((modMask, xK_Tab ), windows W.focusDown)
-- Move focus to the next window
, ((modMask, xK_j ), windows W.focusDown)
-- Move focus to the previous window
, ((modMask, xK_k ), windows W.focusUp )
-- Move focus to the master window
, ((modMask, xK_m ), windows W.focusMaster )
-- Swap the focused window and the master window
, ((modMask .|. shiftMask, xK_Return), windows W.swapMaster)
-- Swap the focused window with the next window
, ((modMask .|. shiftMask, xK_j ), windows W.swapDown )
-- Swap the focused window with the previous window
, ((modMask .|. shiftMask, xK_k ), windows W.swapUp )
-- Shrink the master area
, ((modMask, xK_h ), sendMessage Shrink)
-- Expand the master area
, ((modMask, xK_l ), sendMessage Expand)
-- Push window back into tiling
, ((modMask, xK_t ), withFocused $ windows . W.sink)
-- Increment the number of windows in the master area
, ((modMask , xK_comma ), sendMessage (IncMasterN 1))
-- Deincrement the number of windows in the master area
, ((modMask , xK_period), sendMessage (IncMasterN (-1)))
-- Quit xmonad
, ((modMask .|. shiftMask, xK_q ), io (exitWith ExitSuccess))
-- Restart xmonad
, ((modMask , xK_q ),
broadcastMessage ReleaseResources >> restart "xmonad" True)
++
-- mod-[1..9], Switch to workspace N
-- mod-shift-[1..9], Move client to workspace N
[((m .|. modMask, k), windows $ f i)
| (i, k) <- zip (XMonad.workspaces conf) [xK_1 .. xK_9]
, (f, m) <- [(W.greedyView, 0), (W.shift, shiftMask)]]
++
-- mod-{w,e,r}, Switch to physical/Xinerama screens 1, 2, or 3
-- mod-shift-{w,e,r}, Move client to screen 1, 2, or 3
[((m .|. modMask, key), screenWorkspace sc >>= flip whenJust (windows . f))
| (key, sc) <- zip [xK_w, xK_e, xK_r] [0..]
, (f, m) <- [(W.view, 0), (W.shift, shiftMask)]]
Last edited by ArchArael (2009-03-19 09:58:15)

How to prevent JEditorPane to show remote images

Hello
I make an e-mail client with JEditorPane to show the html content.
If the content contains IMG tag with src like http://somehost.on.the.web...
then JEditorPane tries to load the remote image. But I have an internet connection via proxy. So, JEditorPane cannot find somehost.on.the.web on the LAN and an annoying timeout occurs. If I use System.setProperty("http.proxySet","true"), ... then JEditorPane uses proxy and loads images. I do not want to use a proxy. But how can I eliminate the timeout? It doesn't occur in Linux. In windows it doesn't occur only if there are no active network connections.
I learn that JEditorPane loads images throgh the java.awt.Toolkit.getDefaultToolkit()
ImageView.loadImage()
Could you, please, tell me how can I force JEditorPane to do not load remote images or eliminate the problem with timeout in Windows with LAN.

> I have the first option checked.
I wouldn't use that option, nor would I suggest anyone else
use it UNLESS
you are supremely confident in your ability to not make
mistakes.
Otherwise, it's a train wreck waiting to happen.
> Yes...I DO have check in and check out enabled in the
Sharing Files, Part
> 2
> box.
Which is why you are being prompted to overwrite your local
copy. Are you
the only one working on that site? If so, you do not need, or
even want the
CI/CO option.
Murray --- ICQ 71997575
Adobe Community Expert
(If you *MUST* email me, don't LAUGH when you do so!)
==================
http://www.projectseven.com/go
- DW FAQs, Tutorials & Resources
http://www.dwfaq.com - DW FAQs,
Tutorials & Resources
==================
"kabra001" <[email protected]> wrote in
message
news:fto4ur$c6b$[email protected]..
> Thanks for the response Murray
>
> In the site definition box Editinf Files Part 3 there
are 2 options .....
> 1.Edit local copies on my machine, then upload when
ready.
> 2.Edit directly on server using local network
> I have the first option checked.
> This does not seem to be automatic upload on save
option,....
> however...its
> when I OPEN the LOCALfile that it seems to log in to the
server and GET
> the
> remote copy, not present the local copy for editing.
>
> Yes...I DO have check in and check out enabled in the
Sharing Files, Part
> 2
> box.
>
> cheers
>
>

How to limit nfs share to a specific host

Hi all,
I used the following command in dfstab to limit sharing of a directory to a host called alert1.somedomain.com.
share -F nfs -o rw=alert1.somedomain.com /disk1/share
When I mount the directory in alert1, it can read the directory, but cannot write to the directory.
Thanks

Most likely the other security mechanisms are
blocking you, perhaps just a simple matter of
user permissions. Note that if you are trying to
do this as root on alert1, then you also need to
allow root in the share otherwise the root userid
is mapped to nobody.
-- richard

We have unwanted ads coming up at least when on Facebook. We want to know how to prevent them from showing.

There are unwanted advertisements
coming up on our Facebook page. We want to know how to keep them from coming up.

Scam of course, See: http://news.cnet.com/8301-1023_3-57573495-93/fake-facebook-pages-promise-free-gi fts-in-exchange-for-likes/?part=rss&tag=feed&subj=

How to prevent duplicate contacts show in my iPhone4S after sync with iTune?

Please help! Can't see any result on the previous posted messages

Is Sync Contacts with a supported address book app on your computer now deselected under the Info tab for your iPhone sync preferences with iTunes? If not, deselect this followed by selecting Apply.
If all contacts are available in your iCloud online address book, on your iPhone go to Settings > iCloud. Turn Contacts off for over the air syncing. A warning message will be provided indicating this will remove all iCloud online contacts.
This will not remove the contacts on your iPhone that were synced direct with the address book app on your computer via the iTunes sync process.
Turn Contacts back on for over the air syncing with your iCloud account. You should be provided a merge prompt which you want to select.
This will eliminate the duplicates.

Prevent Mail from showing Attachments inline

Hi there, does somebody know how to prevent Mail to show attachments inline ?
Thanks for your help.
regards,
kd

Sometimes zipping is not an optimal solution, such as when sending to a non computer savvy recipient who may not understand zip files. Is there no way to make sure that an attached image will show as an attachment to the recipient (and therefore by easy to download from the email)? Thanks.

IOMeter hangs when running to a NFS share from Windows Storage Server 2012

Hello,
I am trying to measure performance of NFS share coming from Windows Storage Server 2012 using IOMeter also running on windows Server 2012. I can create the share on WSS2012. Windows 2012 client does see the share. IOmeter does see the share, and I can start
running. But fairly quick IOMeter gets an error, and stops. After that NFS share on the client is not visible to IOMeter anymore. This happen every time.
I have used IOMeter to SMB shares a lot with no problem..
Thanks in advance,
BJ

I am trying to measure performance of NFS share coming from Windows Storage Server 2012 using IOMeter also running on windows Server 2012. I can create the share on WSS2012. Windows 2012 client does see the share. IOmeter does see the share, and I can start
running. But fairly quick IOMeter gets an error, and stops. After that NFS share on the client is not visible to IOMeter anymore. This happen every time.
I have used IOMeter to SMB shares a lot with no problem..
1) Can you use NFS share with NFS clients normally? I mean is it I/O Meter who has issues with streaming or do other apps have similar problems? Say normal copy to / from NFS share?
2) What error exactly is popped up? Do you happen to have a screenshot?
StarWind VSAN [Virtual SAN] clusters Hyper-V without SAS, Fibre Channel, SMB 3.0 or iSCSI, uses Ethernet to mirror internally mounted SATA disks between hosts.

New files and folders on a Linux client mounting a Windows 2012 Server for NFS share do not inherit Owner and Group when SetGID bit set

Problem statement
When I mount a Windows NFS service file share using UUUA and set the Owner and Group, and set the SetGID bit on the parent folder in a hierarchy. New Files and folders inside and underneath the parent folder do not inherit the Owner and Group permissions
of the parent.
I am given to understand from this Microsoft KnowledgeBase article (http://support.microsoft.com/kb/951716/en-gb) the problem is due to the Windows implmentation of NFS Services not supporting the Solaris SystemV or BSD grpid "Semantics"
However the article says the same functionality can acheived by using ACE Inheritance in conjunction with changing the Registry setting for "KeepInheritance" to enable Inheritance propagation of the Permissions by the Windows NFS Services.
1. The Precise location of the "KeepInheritance" DWORD key appears to have "moved" in Windows Server 2012 from a Services path to a Software path, is this documented somewhere? And after enabling it, (or creating it in the previous
location) the feature seems non-functional. Is there a method to file a Bug with Microsoft for this Feature?
2. All of the references on demonstrating how to set an ACE to achieve the same result "currently" either lead to broken links on Microsoft technical websites, or are not explicit they are vague or circumreferential. There are no plain Examples.
Can an Example be provided?
3. Is UUUA compatible with the method of setting ACE to acheive this result, or must the Linux client mount be "Mapped" using an Authentication source. And could that be with the new Flat File passwd and group files in c:\windows\system32\drivers\etc
and is there an Example available.
Scenario:
Windows Server 2012 Standard
File Server (Role)
+- Server for NFS (Role) << -- installed
General --
Folder path: F:\Shares\raid-6-array
Remote path: fs4:/raid-6-array
Protocol: NFS
Authentication --
No server authentication
+- No server authentication (AUTH_SYS)
++- Enable unmapped user access
+++- Allow unmapped user access by UID/GID
Share Permissions --
Name: linux_nfs_client.host.edu
Permissions: Read/Write
Root Access: Allowed
Encoding: ANSI
NTFS Permissions --
Type: Allow
Principal: BUILTIN\Administrators
Access: Full Control
Applies to: This folder only
Type: Allow
Principal: NT AUTHORITY\SYSTEM
Access: Full Control
Applies to: This folder only
-- John Willis, Facebook: John-Willis, Skype: john.willis7416

I'm making some "major" progress on this problem.
1. Apparently the "semantics" issue to honor SGID or grpid in NFS on the server side or the client side has been debated for some time. It also existed as of 2009 between Solaris nfs server and Linux nfs clients. The Linux community defaulted to declaring
it a "Server" side issue to avoid "Race" conditions between simultaneous access users and the local file system daemons. The client would have to "check" for the SGID and reformulate its CREATE request to specify the Secondary group it would have to "notice"
by which time it could have changed on the server. SUN declined to fix it.. even though there were reports it did not behave the same between nfs3 vs nfs4 daemons.. which might be because nfs4 servers have local ACL or ACE entries to process.. and a new local/nfs
"inheritance" scheme to worry about honoring.. that could place it in conflict with remote access.. and push the responsibility "outwards" to the nfs client.. introducing a race condition, necessitating "locking" semantics.
This article covers that discovery and no resolution - http://thr3ads.net/zfs-discuss/2009/10/569334-CR6894234-improved-sgid-directory-compatibility-with-non-Solaris-NFS-clients
2. A much Older Microsoft Knowledge Based article had explicit examples of using Windows ACEs and Inheritance to "mitigate" the issue.. basically the nfs client "cannot" update an ACE to make it "Inheritable" [-but-] a Windows side Admin or Windows User
[-can-] update or promote an existing ACE to "Inheritable"
Here are the pertinent statements -
"In Windows Services for UNIX 2.3, you can use the KeepInheritance registry value to set inheritable ACEs and to make sure that these ACEs apply to newly created files and folders on NFS shares."
"Note About the Permissions That Are Set by NFS Clients
The KeepInheritance option only applies ACEs that have inheritance enabled. Any permissions that are set by an NFS client will
only apply to that file or folder, so the resulting ACEs created by an NFS client will
not have inheritance set."
"So
If you want a folder's permissions to be inherited to new subfolders and files, you must set its permissions from the Windows NFS server because the permissions that are set by NFS clients only apply to the folder itself."
http://support.microsoft.com/default.aspx?scid=kb;en-us;321049
3. I have set up a Windows 2008r2 NFS server and mounted it with a Redhat Enteprise Linux 5 release 10 x86_64 server [Oct 31, 2013] and so far this does appear to be the case.
4. In order to mount and then switch user to a non-root user to create subdirectories and files, I had to mount the NFS share (after enabling Anonymous AUTH_SYS mapping) this is not a good thing, but it was because I have been using UUUA - Unmapped Unix
User Access Mapping, which makes no attempt to "map" a Unix UID/GID set by the NFS client to a Windows User account.
To verify the Inheritance of additional ACEs on new subdirectories and files created by a non-root Unix user, on the Windows NFS server I used the right click properties, security tab context menu, then Advanced to list all the ACEs and looked at the far
Column reflecting if it applied to [This folder only, or This folder and Subdirectories, or This folder and subdirectories and files]
5. All new Subdirectories and files createdby the non-root user had a [Non-Inheritance] ACE created for them.
6. I turned a [Non-Inheritance] ACE into an [Inheritance] ACE by selecting it then clicking [Edit] and using the Drop down to select [This folder, subdirs and files] then I went back to the NFS client and created more subdirs and files. Then back to the
Windows NFS server and checked the new subdirs and folders and they did Inherit the Windows NFS server ACE! - However the UID/GID of the subdirs and folders remained unchanged, they did not reflect the new "Effective" ownership or group membership.
7. I "believe" because I was using UUUA and working "behind" the UID/GID presentation layer for the NFS client, it did not update that presentation layer. It might do that "if" I were using a Mapping mechanism and mapped UID/GID to Windows User SIDs and
Group SIDs. Windows 2008r2 no longer has a "simple" Mapping server, it does not accept flat text files and requires a Schema extension to Active Directory just to MAP a windows account to a UID/GID.. a lot of overhead. Windows Server 2012 accepts flat text
files like /etc/passwd and /etc/group to perform this function and is next on my list of things to see if that will update the UID/GID based on the Windows ACE entries. Since the Local ACE take precedence "over" Inherited ACEs there could be a problem. The
Inheritance appears to be intended [only] to retain Administrative rights over user created subdirs and files by adding an additional ACE at the time of creation.
8. I did verify from the NFS client side in Linux that "Even though" the UID/GID seem to reflect the local non-root user should not have the ability to traverse or create new files, the "phantom" NFS Server ACEs are in place and do permit the function..
reconciling the "view" with "reality" appears problematic, unless the User Mapping will update "effective" rights and ownership in the "view"
-- John Willis, Facebook: John-Willis, Skype: john.willis7416

"Network Error - 53" while trying to mount NFS share in Windows Server 2008 client

CentOS | Windows 2008
I've got a CentOS 5.5 server running nfsd. On the Windows side, I'm running Windows Server 2008 R2 Enterprise. I have the "Files Services" server role enabled and both Client for NFS and Server for NFS are on.
I'm able to successfully connect/mount to the CentOS NFS share from other linux systems but am experiencing errors connecting to it from Windows. When I try to connect, I get the following:
C:\Users\fooadmin>mount -o anon 10.10.10.10:/share/ z:
Network Error - 53
Type 'NET HELPMSG 53' for more information.
(IP and share name have been changed to protect the innocent :-) )
Additional information:
I've verified low-level network connectivity between the Windows client and the NFS server with telnet (to the NFS on TCP/2049) so I know the port is open. I've further confirmed that inbound and outbound firewall ports are present and enabled.
I came across a
Microsoft tech note that suggested changing the "Provider Order" so "NFS Network" is above other items like Microsoft Windows Network. I changed this and restarted the NFS client - no luck.
I've confirmed that the share folder on the NFS server is readable/writable by all (777)
I've tried other variations of the mount command like: mount 10.10.10.10:/share/ z: and
mount 10.10.10.10:/share z: and mount -o anon mtype=hard \\10.10.10.10:/share * No luck.
As per the command output, I tried typing NET HELPMSG 53 but that doesn't tell me much. Just "The network path was not found".
I'm lost on how to proceed with troubleshooting. Any ideas?

There are usully two aspect that come to mind:
1. Syntax of mount command
2. Mismatch of NFS versions
Third reason is here
http://blogs.technet.com/b/sfu/archive/2011/11/21/getting-network-error-53-network-path-not-found-quot.aspx
Rgds
Milos

OSX Clients with portable homes on nfs share on non mac hardware

Hello,
Has anyone already been using an NFS Filer, as EMC VNX, a Netapp or simply a QNAP or other NFS capable device to put the homedirectories for your users on it ?
I've been trying this out now for monthes but without success.
The nfs share should be sys exported eventually with krb5, and all clients should be redirected to that NFS - Sharepoint for their homedirectories in opendirectory.
Server should be Lion with LDAP Master, and the nfs export on an external nfs box.
In lab we tested it, but workgroupmanager quits when trying to create a homedir on the nfs box. (NAS)
Is there a tutorial on how to set that up ? or a whitepaper ?

FWIW: I used the first VAIO's to come out .. then the second lot - We support both Windows and Macs - I had a client who had 'an expert' in Video recommend the Sonys so he bought a few.
They were, in my opinion, the worst video computers I have ever worked with in every single way. It was a real Kludge, the whole thing...- from HW quality through software design, workflow - the lot.. maybe they've improved - but there was a lot of room for it ..:)
I don't think I'd worry too much about the Mac OS running on windows boxen ... it's unlikely to ever work very well or to be a 'mainstream' activity: the 'Mac advantage' is a whole lot more than just the OS in isolation - wonderful tho OS X is...I prefer to think of the huge advantages to Apple of having Windows run on Macs at 'native' speed with Native Apps - It will get a lot of people off the fence and into a Mac. And, as we all know, once you get started down that path, very few ever return *wicked grin*
And yes, the Apple laptops have been the coolest things on the planet for years - IMNSHO... - so is the MacBook Pro - apart from the poor name

How do I show my iCloud purchases in iTunes, but prevent it from showing duplicates of the songs I already have on my computer? There are duplicates of essentially everything! :(

How do I show my iCloud purchases in iTunes, but prevent it from showing duplicates of the songs I already have on my computer? There are duplicates of essentially everything!
I would like to show my available songs that I could download if I want, however the ones I've already downloaded to my computer are showing up still, which results in duplicates of everything (one on my computer, one in the cloud)

No.
Are the photos in an iTunes backup? If so then:
- You can restore another iPod touch, iPhne or iPad from that backup
- Extract the photos from that backup by
How to perform iPad recovery for photos, videos
Wondershare Dr.Fone for iOS: iPhone Data Recovery - Wondershare Official
http://www.amacsoft.com/ipod-data-recovery.html
Otherwise maybe a data recovery company can help. Not cheap.

How can I add email (via outlook client) to share options of preview app

how can I add email (via outlook client) to share options of preview app

You can't. Apple's share button only supports Apple Mail (as specified by launching Apple Mail, choosing preferences and choosing general.). Maybe Apple will open this up to other apps in future updates.

How to PREVENT NFS shares showing on clients?

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