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List:       mandrake-expert-it
Subject:    Re: [expert-it] NFS
From:       BanaSouKi <banasouki () tiscalinet ! it>
Date:       2001-10-03 7:55:14
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ilario wrote:

>Ciao a tutti ho un problema con nfs
>
>Nel dettaglio c'e' una macchina IBM AiX che esporta una directory...
>
>Io dovrei montarla su un PC Linux pero' quando tento di montarla il server mi 
>risponde che non sono autorizzaso...
>
>Un mio collega pare che riesce ad entrare con nfs di OS/2 ma lui mi ha detto 
>che deve necessariamente specificare utenza e password...
>
>Io leggendo il man sia di Mount che di NFS non ho trovato nulla di simile...
>
>Sapete percaso darmi una mano?
>
>Ciao
>
Hola,
innanzitutto devi essere autorizzato a connetterti al server NFS, che 
deve esportare esplicitamente le directory verso la macchina client. Nel 
NFS-HOWTO (tipicamente '/usr/doc/HOWTO/NFS-HOWTO.html') trovi tutte le 
informazioni necessarie, ecco un estratto x il tuo caso:

#############################################


    9. Exporting filesystems

The way to export filesytems with NFS is not completely consistent 
across platforms of course. In this case Linux and Solaris 2 are the 
deviants. This section lists, superficially, the way to do it on most 
systems. If the kind of system you have is not covered you must check 
your OS man-pages. Keywords are: nfsd, system administration tool, rc 
scripts, boot scripts, boot sequence, /etc/exports, exportfs. I'll use 
one example throughout this section: How to export /mn/eris/local to 
apollon read/write.


    9.1 IRIX, HP-UX, Digital-UNIX, Ultrix, SunOS 4 (Solaris 1), AIX

These OSes use the traditional Sun export format. In |/etc/exports| write:

------------------------------------------------------------------------

/mn/eris/local -rw=apollon

------------------------------------------------------------------------

The complete documentation is in the |exports| man page. After editing 
the file run |exportfs -av| to export the filesystems.

How strict the exportfs command is about the syntax varies. On some OSes 
you will find that previously entered lines reads:

------------------------------------------------------------------------

/mn/eris/local apollon

------------------------------------------------------------------------

or even something degenerate like:

------------------------------------------------------------------------

/mn/eris/local rw=apollon

------------------------------------------------------------------------

I recommend being formal. You risk that the next version of |exportfs| 
if much stricter and then suddenly everything will stop working.


    9.2 Solaris 2

Sun completely re-invented the wheel when they did Solaris 2. So this is 
completely different from all other OSes. What you do is edit the file 
|/etc/dfs/dfstab|. In it you place share commands as documented in the 
|share|(1M) man page. Like this:

------------------------------------------------------------------------

share -o rw=apollon -d "Eris Local" /mn/eris/local

------------------------------------------------------------------------

After editing run the program |shareall| to export the filesystems.

------------------------------------------------------------------------


##############################################

Una volta esportata correttamente la directory, devi montarla localmente 
aggiungendo una riga in '/etc/fstab' del tipo:

hermes:/home/hermes/boh /home/boh/share nfs bg,exec,dev,suid,rw  1 1

e poi 'mount /home/boh/share'... comunque 'man nfs'!
N.B. Il mount in read/write fallisce se fra le 2 macchine c'è differenza 
di UID/GID, quindi se hai bisogno di scrivere, puoi provare il trucco di 
cambiare i tuoi U/GID locali. Alternativamente, puoi installare il 
demone 'ugidd' che fa la conversione degli U/GID.



Saluti,

^b





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