[CentOS] libz.so.1 => not found

> 
> 
> Thank you!  I've copied the file using USB drive and now the server is up and running.  I also did yum reinstall zlib.
> 
> Now when I do yum update, it says: No Packages marked for Update
> 
> If that's the case, how come /etc/redhat-release still shows CentOS release 5.5 (Final) ?
> 
> Asya

I figured it out.  Whoever was in charge of this server before me, added the following lines to CentOS-Base.repo

exclude=kernel kernel-devel kernel-PAE-*

Thank you all for your help!

Asya