 Linux    .    
 mkfifo:

 mkfifo AA
. # Is -I AA

prw-rw-r--   1 root     root            0 Apr 26 13:11 AA

       Is -1 ,    -
.

 UNIX  Linux       .
        
  -  .     -
        .  
     FIFO.      
.          
   .      
 .       (asynchro-
nous, async),          .



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 ,     .   -
     ,     -
 .        
          -
 .      ,  ssh  scp.

    

   (major device number)   
: , ,  ,     .  -
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   (minor device number)   -
   .        
  ,        -
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    .

   

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    .

  (block device)    /, :

      .

    .

      .

 12. ,                                     461