Yum update

[Arnaldo Bento]

Hello

I trying to do the update but I got the following dependencie:

>[root at aabento root]# yum update
>Gathering header information file(s) from server(s)
>Server: Fedora Core 1.91 - Development Tree
>Finding updated packages
>Downloading needed headers
>Resolving dependencies
>.Package ethereal-gnome needs libpcap.so.0.8.1, this is not >available.
>Package ethereal needs libpcap.so.0.8.1, this is not available.
>[root at aabento root]#

Where can I find the above file?
I look in the mirrors sites and I did not found it!

Thanks in advance for your help.

Arnaldo