$ echo "hello world" > xxyyzz
$ ln xxyyzz aabbcc
$ ln xxyyzz ddeeff
$ ls -li aabbcc ddeeff xxyyzz 
     45063 -rw-r--r--   3 root     root          12 Aug  7 23:36 aabbcc
     45063 -rw-r--r--   3 root     root          12 Aug  7 23:36 ddeeff
     45063 -rw-r--r--   3 root     root          12 Aug  7 23:36 xxyyzz
$ cat aabbcc 
hello world
$ echo bye >> ddeeff 
$ cat xxyyzz 
hello world
bye
$ rm aabbcc
$ ls -li aabbcc ddeeff xxyyzz
aabbcc: No such file or directory
     45063 -rw-r--r--   2 root     root          16 Aug  7 23:38 ddeeff
     45063 -rw-r--r--   2 root     root          16 Aug  7 23:38 xxyyzz
$