 ,    .     -
    ,         . -
,      ,   
     ,   . ,   -
       make,    -
  .

     ,  ,
    .         -
     ,       -
  .       ,   -
     ,     
.    ,     .   -
     ,       
   .     
   .

In:   

      In   --symbolic
( -s).       /tmp/s3   snm 
  .       
Is -1  Is      ,    . 
     1 ("link"  ):

$ In --symbolic /home/alex/sum /tmp/s3
$ Is -1 /home/alex/sum /tmp/s3

-rw-rw-r-- ' 1 alex     alex           38 Jun 12 09:51 /home/alex/sum
Irwxrwxrwx   1 alex     alex           14 Jun 12 10:09 /tmp/s3 ->
/home/alex/sum
$ cat /tmp/s3
 .

       .    -
 ,       ,  
 .

         : ,
   ,     ,
,      ,   
  (   ,    ).  
     sum   /tmp.    ,
 cat    :

$ pwd

/home/alex

$ In --symbolic sum /tmp/s3

$ Is -1 sum /tmp/s3

Irwxrwxrwx 1 alex   alex              3 Jun 12 10:13 /tmp/s3 -> sum

-rw-rw-r-- 1 alex   alex             38 Jun 12 09:51 sum

$ cat /tmp/s3

cat: /tmp/s3: No such file or directory (    ) 

 6,   Linux 215