 9.3.  
                                  

  ,         HISTSIZE            500 
   .

  .         HISTFILE           -/.bash history

  ,         HISTFILESIZE       500 
  .

     100  ,  -
         .bash_profile  .profile
(     ):

$ HISTSIZE=100

   bash     100 -
 :

$ HISTFILESIZE=100

  HISTFILESIZE         ,   -
    100     .

        history. 
   :          
 .         history, 
  .      
 bash,      ,   
.      HISTSIZE   
10,  HISTFILESIZE   20. (      20, -
     ,     -
     20.)

32 $ history

23 PS1="\! \# bash\$ "

24 Is -1

25 cat temp

26 rm temp

27 vi memo

28 Ipr memo

29 vi memo

30 Ipr memo

31 rm memo

32 history

           -
      history.     history
    less (.  "less   more:  
 "  5),    history 10,   -
  ,  .

 9.  II: Bourne Again Shell                                            323