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$ sudo yum install spacewalk-backend
Failed to set locale, defaulting to C
Loaded plugins: security
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package spacewalk-backend.noarch 0:2.0.3-1.el6 will be installed
--> Processing Dependency: rhnlib >= 2.5.57 for package: spacewalk-backend-2.0.3-1.el6.noarch
--> Processing Dependency: spacewalk-backend-libs >= 1.1.16-1 for package: spacewalk-backend-2.0.3-1.el6.noarch
--> Processing Dependency: python-debian for package: spacewalk-backend-2.0.3-1.el6.noarch
--> Processing Dependency: /etc/rhn for package: spacewalk-backend-2.0.3-1.el6.noarch
--> Running transaction check
---> Package rhnlib.noarch 0:2.5.65-1.el6 will be installed
---> Package spacewalk-backend.noarch 0:2.0.3-1.el6 will be installed
--> Processing Dependency: python-debian for package: spacewalk-backend-2.0.3-1.el6.noarch
---> Package spacewalk-backend-libs.noarch 0:2.0.3-1.el6 will be installed
---> Package spacewalk-proxy-common.noarch 0:2.0.2-1.el6 will be installed
--> Processing Dependency: spacewalk-proxy-broker >= 2.0.2 for package: spacewalk-proxy-common-2.0.2-1.el6.noarch
--> Running transaction check
---> Package spacewalk-backend.noarch 0:2.0.3-1.el6 will be installed
--> Processing Dependency: python-debian for package: spacewalk-backend-2.0.3-1.el6.noarch
---> Package spacewalk-proxy-broker.noarch 0:2.0.2-1.el6 will be installed
--> Processing Dependency: spacewalk-certs-tools for package: spacewalk-proxy-broker-2.0.2-1.el6.noarch
--> Processing Dependency: spacewalk-proxy-package-manager for package: spacewalk-proxy-broker-2.0.2-1.el6.noarch
--> Processing Dependency: spacewalk-ssl-cert-check for package: spacewalk-proxy-broker-2.0.2-1.el6.noarch
--> Processing Dependency: squid for package: spacewalk-proxy-broker-2.0.2-1.el6.noarch
--> Running transaction check
---> Package spacewalk-backend.noarch 0:2.0.3-1.el6 will be installed
--> Processing Dependency: python-debian for package: spacewalk-backend-2.0.3-1.el6.noarch
---> Package spacewalk-certs-tools.noarch 0:2.0.1-1.el6 will be installed
--> Processing Dependency: rhn-client-tools for package: spacewalk-certs-tools-2.0.1-1.el6.noarch
--> Processing Dependency: rpm-build for package: spacewalk-certs-tools-2.0.1-1.el6.noarch
---> Package spacewalk-proxy-package-manager.noarch 0:2.0.2-1.el6 will be installed
--> Processing Dependency: rhnpush for package: spacewalk-proxy-package-manager-2.0.2-1.el6.noarch
---> Package spacewalk-ssl-cert-check.noarch 1:2.3-1.el6 will be installed
---> Package squid.x86_64 7:3.1.10-19.el6_4 will be installed
--> Running transaction check
---> Package rhn-client-tools.noarch 0:2.0.1-1.el6 will be installed
--> Processing Dependency: python-dmidecode for package: rhn-client-tools-2.0.1-1.el6.noarch
--> Processing Dependency: python-hwdata for package: rhn-client-tools-2.0.1-1.el6.noarch
--> Processing Dependency: python-gudev for package: rhn-client-tools-2.0.1-1.el6.noarch
---> Package rhnpush.noarch 0:5.5.65-1.el6 will be installed
---> Package rpm-build.x86_64 0:4.8.0-32.el6 will be installed
---> Package spacewalk-backend.noarch 0:2.0.3-1.el6 will be installed
--> Processing Dependency: python-debian for package: spacewalk-backend-2.0.3-1.el6.noarch
--> Running transaction check
---> Package python-dmidecode.x86_64 0:3.10.13-3.el6_4 will be installed
---> Package python-gudev.x86_64 0:147.1-4.el6_0.1 will be installed
---> Package rhn-client-tools.noarch 0:2.0.1-1.el6 will be installed
--> Processing Dependency: python-hwdata for package: rhn-client-tools-2.0.1-1.el6.noarch
---> Package spacewalk-backend.noarch 0:2.0.3-1.el6 will be installed
--> Processing Dependency: python-debian for package: spacewalk-backend-2.0.3-1.el6.noarch
--> Finished Dependency Resolution
Error: Package: rhn-client-tools-2.0.1-1.el6.noarch (spacewalk)
           Requires: python-hwdata
Error: Package: spacewalk-backend-2.0.3-1.el6.noarch (spacewalk)
           Requires: python-debian