Fedora FedoraCore FC RedHatEnterpriseLinux-2.1 RHEL-2.1 RedHatEnterpriseLinux-3 RHEL-3 CentOS-3 RedHatEnterpriseLinux-4 RHEL-4 CentOS-4 ScientificLinux-4 SL-4 RedHatEnterpriseLinux-5 RHEL-5 CentOS-5 ScientificLinux-5 SL-5 RedHatEnterpriseLinux-6 RHEL-6 CentOS-6 ScientificLinux-6 SL-6 OracleEnterpriseLinux-6 OEL-6 Ubuntu Windows RedHatLinux RHL OpenSUSE Debian RHELMock FedoraMock i386 x86_64 url iso [Tt][Rr][Uu][Ee] [Ff][Aa][Ll][Ss][Ee] [Yy][Ee][Ss] [Nn][Oo] raw [a-zA-Z0-9+/]+={0,2} base64