[root@localhost cdrom]# yum clean all
Configuration file /etc/yum/pluginconf.d/aliases.conf not found
Unable to find configuration file for plugin aliases
Configuration file /etc/yum/pluginconf.d/changelog.conf not found
Unable to find configuration file for plugin changelog
Configuration file /etc/yum/pluginconf.d/downloadonly.conf not found
Unable to find configuration file for plugin downloadonly
Configuration file /etc/yum/pluginconf.d/presto.conf not found
Unable to find configuration file for plugin presto
Configuration file /etc/yum/pluginconf.d/tmprepo.conf not found
Unable to find configuration file for plugin tmprepo
Configuration file /etc/yum/pluginconf.d/verify.conf not found
Unable to find configuration file for plugin verify
Configuration file /etc/yum/pluginconf.d/versionlock.conf not found
Unable to find configuration file for plugin versionlock
Loaded plugins: fastestmirror, security
Repository base is listed more than once in the configuration
Cleaning repos: base extras updates
Cleaning up Everything
Cleaning up list of fastest mirrors
[root@localhost cdrom]# yum install httpd
Configuration file /etc/yum/pluginconf.d/aliases.conf not found
Unable to find configuration file for plugin aliases
Configuration file /etc/yum/pluginconf.d/changelog.conf not found
Unable to find configuration file for plugin changelog
Configuration file /etc/yum/pluginconf.d/downloadonly.conf not found
Unable to find configuration file for plugin downloadonly
Configuration file /etc/yum/pluginconf.d/presto.conf not found
Unable to find configuration file for plugin presto
Configuration file /etc/yum/pluginconf.d/tmprepo.conf not found
Unable to find configuration file for plugin tmprepo
Configuration file /etc/yum/pluginconf.d/verify.conf not found
Unable to find configuration file for plugin verify
Configuration file /etc/yum/pluginconf.d/versionlock.conf not found
Unable to find configuration file for plugin versionlock
Loaded plugins: fastestmirror, security
Repository base is listed more than once in the configuration
Determining fastest mirrors
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=6&arch=i386&repo=os error was
14: PYCURL ERROR 52 - "Empty reply from server"
Error: Cannot find a valid baseurl for repo: base
[root@localhost cdrom]#