TCP software is usually located in the kernel of operating system. This situation brings difficulties to research and debug of TCP.

TCP软件一般位于操作系统的核心，这种情况给TCP的研究和调试带来了很大的困难。

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The probes monitor all database transactions, including those of privileged users, at the operating system kernel level without relying on database audit logs.

探测器在操作系统内核级上监视所有数据库事务，包括特权用户的事务，而不依赖于数据库审计日志。

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Operating system-level virtualization is a server virtualization method where the kernel of an operating system allows for multiple isolated user-space instances.

操作系统级的虚拟化是一种服务器虚拟化方法，在这种方法中，操作系统的内核支持多个相互隔离的用户空间实例。

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After some investigation, the problem appeared to be in the Linux network file system (NFS) kernel, the piece of the operating system responsible for some basic server functions.

CNN: Linux gaining with mission-critical systems

On January 4th, Linus Torvalds, the Finnish programmer who co-ordinates the development of Linux (see article), quietly released the latest version of the Linux kernel the software that, as its name suggests, is at the core of the operating system.

ECONOMIST: Computing