():  
 

      Linux,  
    .      "-
"  7.

 (process)    ,    Linux  -
   ,  /      Linux (.
 "  "  7).   -
       UNIX  Linux.  (pipe, 
     |      
  )    
 .     ,     
        .   UNIX/Linux
          
   .  ,   
,    .     
  .       
   ,       ( 
        "   
"  7). ,  head,       ,
        head,   
. , ,   . 5.5,     :

$ cat months | head



Map








         months:

$ cat months | head -1



  

 echo  date         
 Linux.  script      ,   
  ,      Windows-.

echo:  

 echo          echo.
    . 5.9.   ,  

164                                               II.   Red Hat Linux