Will changing the value of $drupal_hash_salt in settings.php file break site I was looking through a list of steps to take when there is a risk that your site has been hacked.  It recommends changing the value of $drupal_hash_salt in settings.php.

According to the inline comments in settings.php:


  Salt for one-time login links and cancel links, form tokens, etc.
  
  This variable will be set to a random value by the installer. All one-time
  login links will be invalidated if the value is changed. Note that if your
  site is deployed on a cluster of web servers, you must ensure that this
  variable has the same value on each server. If this variable is empty, a hash
  of the serialized database credentials will be used as a fallback salt.


Can I simply replace the existing value with random string?  I am worried that changing this string may adversely effect some other aspect of site functionality.
Disruption should be minimal -- the salt value was designed to be changeable. As it says, it will invalidate one-time login links when the salt is changed. But if you suspect that you've been hacked, this is precisely what you want to happen.