 . (       , 
 " ".)

 ,    ,   
  ,       -
 .     , who,   -
,   ,  ,    ,
   .

    w  finger    , ,  
    ,    . 
    ,     finger (.  "finger:

    "  10)   -
  ,    .

     . 5.1     .

who:     

 who      .  . 5.11 -
    who ,      (alex) 
 (jenny),      .     -
 ,     ,  
.          .

$ who

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

. 5.11.  who      

,   who, ,     -
    .     ,  -
         write (.  "write:

 "    ).  who   ,  -
       ,     
(.  " "    ).

    who    ,  
    (I, .  ""  7)    less, -
    .     
   ,      .

   ,          -
,    who am i (" "):

$ who am i

bravo.tcorp.com!alex       pts/5        Mar 27 12:33

174  II.   Red Hat Linux