 . 7.8 ,     cat    
,   (   :     -
  cat)      .    -
   : stationery, tape  pens.   
cat       .  cat    
  ,           .
        supply_orders. 
 cat ,   supply_orders      .

$ cat stationery

 2000  :      10/7/02

$ cat tape

 1   :   10/14/02

 5   : 10/28/02

$ cat pens

 12   :    10/4/02

$ cat stationery tape pens > supply orders

$ cat supply orders

 2000  :      10/7/02

 1   :   10/14/02

 5   : 10/28/02

 12   :    10/4/02

$

. 7.8.      cat

  

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   .  
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    ,    
(. 7.9).   , -
  ,   :

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      (,
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 ,  _    -
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 . 7.10   cat  , -
    . 7.8  supply_orders, 
   .    cat    -
 .         EOF ("end
of file"   ),   <CONTROL+D>  .

  cat   ,   ,   
,     cat      .  cat
       Linux.  
     lp, sort  .     -

230  II.   Red Hat Linux

S -
g  


. 7.9.  -
 

