 IFS,        
      TAB,       
 .   IFS     
  ,   ,   .   -
       (word splitting). 
    IFS    :

$ a=w:x:y:z

$ cat $a

cat: w:x:y:z: No such file or directory     (    )

$ IFS=":"

$ cat $a

cat: w: No such file or directory

cat: x: No such file or directory

cat: y: No such file or directory

cat: z: No such file or directory

    cat    , -
  w:x:y:z   ,     
cat.  cat       w:x:y:z    , -
    .   IFS  (:)  
            cat. 
 cat        : w, x,   z.
      (:)    
 .

      ,  -
,   IFS.      -
.   :

$ IFS="p"
$ export IFS

  IFS   ,     
,   export  .     -
     export:

$ IPS=p

$ aa=export

$ $ IFS

2 files to edit                            (2   )
ort: 2 files to edit: new file: line 1
(2   :  :  1)



1 more files to edit                       ( 1   )

.

$

    ,      export  -
,          :

ort  IFS.   IFS  .

342  III.   Red Hat Linux