 

,     ,  .
,    files  nis     
     .     ,
      (),    
   .

  nsswitch.conf       -
   (    ).     
:         ; 
     .   ,  -
  ,      
.

        nisswitch.conf  
       /etc/passwd,      -
    NIS.       ,
     ,    .  -
  NIS,     /etc/hosts,     -
   DNS   .

passwd         files nis
hosts          nis files dns

  

     ( )    ,
,          
- .    :

[ [!] "]

          
  ;  (   ,
   )   ;     ,
      .   (!)
         .

  :

 NOTFOUND.  ,     .   -
  continue.

 SUCCESS.      ;   .
    return.

 UNAVAIL.   ,     . -
,          . 
   continue.

 TRYAGAIN.   ,     . -
,       .   -
  continue.

  :

 return.         .

 11.  :                     437