Oracle Linux 7.4 發布了。改版本的更新領域主要涉及安全性的改進，以及對雲和容器環境的支持的改進。
Oracle Linux 7.4 通過幾項新功能不斷提升安全性，包括：
A system in Secure Boot mode loads only those boot loaders and kernels that have been signed by Oracle. Oracle has updated the kernel and grub2 packages to sign them with a valid Extended Validation (EV) certificate. The EV certificate has been compiled into the shim binary and has been signed by Microsoft.
By default, the algorithm for public key signatures that is used in this release is SHA-2. SHA-1 is available for backward compatibility purposes only.
Enhances security during installation. The new payload_gpgcheck option enables yum to perform a GNU Privacy Guard (GPG) signature check on the payload sections of packages. This capability provides enhanced security and integrity when installing packages.
NBDE enables you to encrypt root volumes of hard drives on physical machines without requiring you to manually enter a password when the systems are rebooted.
The USBGuard software framework provides system protection against intrusive USB devices by implementing basic whitelisting and blacklisting capabilities that are based on device attributes.
Oracle Linux 7.4 不斷加強客戶的雲和容器部署：
Btrfs is the ideal filesystem for supporting containers in the cloud. We continue to support and enhance Btrfs in Oracle Linux 7 with Unbreakable Enterprise Kernel Release 4 allowing you to continue to use Btrfs for your container cloud deployments.
Prevents container users from being able to gain the same privileges at the global level by allowing separation of the container namespace from the underlying operating system namespace.
Oracle Linux 7 Update 4 makes it even easier to install and add a system to Spacewalk by not requiring the spacewalk client to be installed before registering with the Spacewalk server.
主要性能提升:
Replaced ticket spin locks with queued spin locks which provide better scalability under contention and higher performance overall.
http-parser is designed for high performance web applications by eliminating buffering, system calls and allowing interrupts.
libfastjson is a limited feature set JSON library that provides significantly improved performance, compared to json-c.
更多內容請查閱官網更新，下載地址：https://www.oracle.com/downloads/index.html