how to make sure cups running

I have MBWE II from another people and I think cups have been installed because I found /opt/etc/cups and theothers cups directory.
when I try to edit cupsd.conf file I see the same configuration with the tutorial at,
I have chenge the MBWE default ip to the new ip so I just edit cupsd.conf "Allow From" to "Allow From" (as mywork IP) and browsing to http://mybookIP:631 or https://mybookIP:631 but can't establish a connection to the server (using mozilla firefox 3.0)
then I try
[root@nas ~]# ldconfig
ldconfig : /usr/lib/ is not a symlink
[root@nas ~]#

How to make sure the cups running on my MBWE, thanks …

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