[root@www yum.repos.d]# yum clean all
Repository testing already added, not adding again
Cleaning up Everything
63 headers removed
63 packages removed
8 metadata files removed
4 cache files removed
[root@www yum.repos.d]# yum update
Repository testing already added, not adding again
Setting up Update Process
Setting up Repos
update                    100% |=========================|  951 B    00:00
base                      100% |=========================| 1.1 kB    00:00
addons                    100% |=========================|  951 B    00:00
extras                    100% |=========================| 1.1 kB    00:00
Reading repository metadata in from local files
http://mirror.centos.org/centos/4/updates/i386/repodata/primary.xml.gz: [Errno 4] IOError: HTTP Error 404: Not Found
Trying other mirror.
Error: failure: repodata/primary.xml.gz from update: [Errno 256] No more mirrors to try.
[root@www yum.repos.d]#