 sort         
,      ,  . 7.13   
"<"     .

 . 7.14        temp.  
     who    sort. 
sort      ,     -
   .

$ who	sort				
alex	pts/4	Mar	27	12	23
alex	pts/5	Mar	7.1	12	33
jenny	pts/7	Mar	26	08	45
root	console	Mar	27	05	00

. 7.14.     

     ,        ,
       who   (. 
"grep:  "  5).       , -
   root:

$ who |  'root'

root       console      Mar 27 05:00

    ,     ,
,     ,     -
    less (.  "less   more: 
  "  5):

$ Is | less

 less    .4   
,   .      RETURN.  -
   h,     q.



 (filter)   ,       -
   .  ,  ,  
          
           -
  .        .

      sort,    -
     who,      
      1.    -
    who  :

$ who | sort | Ipr

        . 
   Is            less.

 7.  I: Bourne Again Shell                                            235