   1.0.0  nfs-utils    ,
 exportfs       sync 
async.

 wdelay (no_wdelay). write delay ( ).   -
    ,    
   ,   ,  
    .  no_wdelay   -
       ,   -
        .

   

       UID    GID.
  /etc/passwd  /etc/group     . 
   NFS-,      -
    ,      :

             ,
,       
(       "NIS  NFS").

  ,   root      -
 ,  root  .

    ,   root (,
 bin),       
  .

   ,  NFS,   root.

  ,   root-squash,  root 
 ,     su     -
 ,         . 
   all-squash  NFS-    ,
 root. ,       root,
  bin   ,        
      NFS  .
        -
   root,        -
 .

  .  ,     ,
 ,  ,   .     NFS -
  :

     root-squash   
root     nfsnobody  .

     all-squash    NFS  -
   nfsnobody  .

 /etc/passw ,  UID  GID  nfsnobody  65534.
       anonuid  anongld.

NIS  NFS.      NIS (.  21), -
    UID   .  NFS -

688                            V.     