        
Linux.     who, sort  Ipr       -
 ,          -
.          -
          .

tee:      

 tee ("tee"  ),   ,   -
     ,    .    -
:            -
 .  . 7.15    who   
    tee.  tee     
 who. out,        .  
tee       ,   -
,   root.

$ who | tee who.out | grep root

root console Mar 27 05:00

$ cat who.out

root console Mar 27 05:00

alex pts/4 Mar 27 12:23

alex pts/5 Mar 27 12:33

jenny pts/7 Mar 26 08:45

. 7.15.   tee

 
  

  ,       ,   
  (foreground).      
   ,       -
  .       (background) 
   ,    .

 (job)        , 
   .          -
 ,      .   -
        Linux: .
       ,   
       .   
 ,       . ,  -
 GUI-     ,  
 .

         RETURN, -
  ,    (&).   -

236                                               II.   Red Hat Linux