 bash    ,     (, -
   bash),     .bashrc.    
    ()  ,   -
  ,    /etc/profile  .bash_profile.

, ,  ,    (, -
         ), 
   BASH_ENV,     ,  ENV.   
       ,    
   .

          ,
  bash       
.bash_profile  .bashrc.  ,      
  bash,   .bashrc,   .bash profile  
      .bashrc,     ENV
 -/.bashrc.    .bashrc     
.         ,bash_profile -
 :

export ENV=~/.bashrc
if [ -f -/.bashrc ]; then source ~/.bashrc; fi

  

    ,   ,  -
 .     . ,
    ,    ,   -
 ,   .      -
    ,    . , 76, MY_CAT  _X__  -
  , a 69TH_STREET (  )  MY-NAME (
)  .  ,     
,  ,  .  
,      ( ) 
  ,          -
  .       
 ,        (readonly),   
  . ,  ,   -
.        , -
  .

    ,      
    :

$ myvar=abc

         
  ($):

$ echo $myvar

abc

302  III.   Red Hat Linux