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The Linux kernel is like the central core of the operating system, managing system resources and communicating between your computer's hardware and software. Given its importance, Linux administrators often need to tweak kernel parameters to optimise system performance or enhance security. One of the primary tools for configuring these parameters is sysctl. sysctl is a utility under Linux that allows reading and writing kernel parameters at runtime. Kernel parameters control everything from the maximum size of a message queue to the maximum size of the various types of inter-process communication (IPC). These configurations are available under /proc/sys/.