 (,    ).       
     (%)   .  
   you have mail ( ),  
        .

 MAILCHECK      
 .    60 .    
 ,         -
.    MAILCHECK  ,   -
    :

$ unset MAILCHECK

PS1:   ()

 PS1  ,   ,  ,
    .  bash,    
,   $    ;   
 .     PS1  prompt   -
 .

            -
.    ,      
,       (    
  ):

$ PSl="'hostname': "
bravo.tcorp.com: echo 

bravo.tcorp.com:

   :

$ PS1="$(hostname): "

PS2:   ()

  2 ("Prompt String 2"  PS2)   ,
    PS2.       -
 echo     .  ,    -
         (>).  -
 ,        -
 .      ,  
 :

$ echo "  
> 2"

  

2

$ 82=" : "

$ echo " 

 :   2"

 

  2

 9.  II: Bourne Again Shell 313