From RootdevWiki
We all know you can create a symbolic link as follows:
~$ ln -s file foo ~$ ls -la foo ~$ lrwxrwxrwx 1 cdibble cdibble 4 2006-06-19 15:02 foo -> file
Did you know you can repoint a Symlink without having to remove and recreate it first?
But how? I hear you cry...
Simple, just add a -f switch if the target is a file:
~$ ln -sf file2 foo ~$ ls -la foo ~$ lrwxrwxrwx 1 cdibble cdibble 4 2006-06-19 15:02 foo -> file2
or -fn if it's a directory:
~$ ln -s dir1 foo ~$ ls -la foo ~$ lrwxrwxrwx 1 cdibble cdibble 4 2006-06-19 15:02 foo -> dir1 ~$ ln -fsn dir2 foo ~$ ls -la foo ~$ lrwxrwxrwx 1 cdibble cdibble 4 2006-06-19 15:02 foo -> dir2
Magic huh?
