Oracle Linux is the only direct upgrade path for CentOS (afaik). A full reinstall is required to move from CentOS to RHEL. Oracle has a procedure to directly c

Oracle Linux is the only direct upgrade path for CentOS (afaik). A full reinstall is required to move from CentOS to RHEL. Oracle has a procedure to directly convert CentOS, RHEL, and Scientific Linux into a supported Oracle Linux system. KSplice is the most common reason why this conversion is required and mandated. If downtime can no longer be tolerated for upgrades to openssl/glibc/vmlinuz, this is the only available path.