A configuration file, also known as a config file, is a local file that controls the operations of a program, utility or process. Linux configuration files contain the settings and instructions for different systems, utilities, applications and processes.

Where is the configuration file in Linux?

Linux treats each device as a special file. All such files are located in /dev . /etc – Contains most system configuration files and the initialisation scripts in /etc/rc. d subdirectory.

What does a config file do?

A configuration file, often shortened to config file, defines the parameters, options, settings and preferences applied to operating systems (OSes), infrastructure devices and applications in an IT context. Software and hardware devices can be profoundly complex, supporting myriad options and parameters.