Which directory in Linux is primarily used for configuration files of system processes?

The directory primarily used for configuration files of system processes in Linux is /etc. This directory contains a variety of configuration files and directories that control the behavior of the system and its applications. It is standard for system administrators to find important configuration settings for services and daemons residing in /etc, which might include network configurations, user account information, and system service settings.

Understanding the role of /etc is crucial for system configuration and management tasks, as it allows administrators to customize and control system behavior effectively. Other directories like /lib, /usr, and /proc serve different purposes in the Linux filesystem hierarchy. For instance, /lib contains shared libraries necessary for system information and executables, /usr is intended for user programs and data, and /proc is a virtual filesystem that provides process and kernel information at runtime.