Sysctl is an utility installed by default in all modern Linux distributions. It is used both to read and write the value of kernel parameters at runtime; the available parameters are those listed under the
/proc pseudo-filesystem, and specifically under the
/proc/sys directory. In this article we learn how to use this utility, how to make changes persist a reboot, and how to load settings from a file “manually”.
This is a companion discussion topic for the original entry at https://linuxconfig.org/how-to-read-and-change-the-value-of-kernel-parameters-using-sysctl