The file extension CFG is used for configuration files, ie configuration files. CFG files are used by a large number of user programs, but also many games.
For example, while user programs store network settings or paths in them, CFG files often contain graphics and sound settings in games. Many CFG files are simple text files that can also be opened and edited with a text editor. Most CFG files contain a list of variables to which a value is assigned. Changing such a value can affect the associated program or game.
In addition to the CFG files in plain text format, there are also those in binary format or in compressed form. These can only be read and changed by the corresponding program. In general, CFG files can not be opened by the user in a program, but have to be in the default directory of the corresponding program or game and are loaded automatically.
It is usually not possible to use the contents of a CFG file to close the associated program. In addition, CFG files are not compatible with each other since each program expects different entries (e.g., variables).
Some programs have a routine for creating a standard CFG file, should none exist. Deletes or shifts (recommended) so the CFG file (the program should not be running), the next time the program is started (as such a function is available), a new CFG is created and all the settings regulated over it to the original value. You may also get an error message.
On Linux systems, configuration files have the file extension conf in the normal case instead of cfg.