 nameserver ,      -
      IP-  .   -
      10-   .  -
  ,        

10.0.0.50.     10     ,   

10.0.0.51.  resolv.conf     
,    (Point to Point Protocol  -
 )  DHCP (Dynamic Host Configuration Protocol   -
  ).    
man- resolv.conf  resolver.

/ete/rpc.   RPC   RPC.      
   RPC,   RPC  .

/etc/senrices.    .      
  , / ,   
,   .    ,   -
            .
 services       
     .

/etc/shadow.         
MD5 (. ).     ,   
,  :

 :: ::::

: :

_       ,  
     login:     -
.      ,   
  passwd.       -
  passwd   ,    
.

 _ ,     .  
   ,   ,   
  ;     ,   -
   .       -
   ,     . 
.    ,      
   ,    .  -
      ,    _. -
          .
      " " 
system-config-users (.  "system-config-users:   -
 "  16).

   shadow   root,      -
     ,      
         -
,    .

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