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Configuration files in a Linux system are typically found in the /etc directory. This directory is specifically designated for system-wide configuration files that define how the system and installed applications behave. Examples of configuration files in /etc include system files like passwd, which defines user accounts, and network configuration files like resolv.conf, which specifies DNS settings.
The /etc directory adheres to the Filesystem Hierarchy Standard (FHS) and acts as a central repository for configuration settings that affect the entire system, making it essential for system administrators to familiarize themselves with its contents.
Other choices, such as /home, /usr, and /var, serve different purposes. The /home directory contains user-specific files and settings, /usr is intended for user programs and data, and /var holds variable files like logs and temporary files. Thus, these directories do not typically store the global configuration files that reside in /etc.