I have a fc19 host at work.  
This morning `crontab` did not work.

    $ ls -l /usr/bin/crontab
    ----------. 1 root root 53472 Jun 11  2013 /usr/bin/crontab

The permissions `--------`  means no one has access and can't change rights or rename etc.

To have access to this should the permission be changed to `rwxr-xr-x`?  
What can do ?