[CentOS] yum update after fresh 5.6 install fails

centos-bounces at centos.org wrote:
> Hi,
> I just finished installing a CentOS 5.6 x86_64 system and the first
> thing I wanted to do after the install is to apply the
> software patches.
> 
> But I get the following error when I try to run 'yum update':
> 
>     Package libuser-0.54.7-2.1.el5_5.2.x86_64.rpm is not signed
> 
> and yum update exits without applying any of the patches.

yum --skip-broken update


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