The File Extensions Database

.CONF File Extension

  • Category: Settings Files
  • Format: Text

What is an .CONF file?

.CONF is Unix Configuration File

A CONF file is a configuration or "config" file used on Unix and Linux based systems. It stores settings used to configure system processes and applications. CONF files are similar to .CFG files found on Windows and Macintosh systems.

Most users will not come across a CONF file unless they are looking to modify specific settings. If you need to open a CONF file, you can use TextMate in macOS or GNU Emacs in Linux.

Some examples of configuration files include rc.conf for the system startup, syslog.conf for system logging, smb.conf for the Samba server, and httpd.conf for the Apache Web server.

Common CONF Filenames

httpd.conf - The Apache HTTP Server configuration file containing "directives" that configure what features are enabled for the Web server. It is often located in the /etc/httpd/ directory on Unix-based systems.

Programs that open Unix Configuration File
MacroMates TextMate
GNU Emacs
File Type 2 Generic Configuration File
Category: Settings Files Format: Text

Plain text configuration file used by various programs; may contain software parameters, user preferences, and other settings; typically is sectioned and marked up with application-specific keywords and values.

An example of a program that uses CONF files is Subversion, a version control system used by software developers.

NOTE: CONF files are similar to .CONFIG files.

Programs that open Generic Configuration File
File Viewer Plus
Microsoft Notepad
Microsoft WordPad
Kingsoft Writer
Apple TextEdit
MacroMates TextMate
Bare Bones TextWrangler
GNU Emacs

How to solve problems with CONF files

  • Associate the CONF file extension with the correct application. On :
    Windows: Right click on any CONF file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.CONF files". Mac: Right click (or Ctrl-click) the CONF file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .CONF is Unix Configuration File. Because only the current version supports the latest CONF file format. Search, therefore, e.g. on the N/A manufacturer website after an available .CONF is Unix Configuration File update.
  • To make sure that your CONF file is not corrupted or virus-infected, get the file again and scan it with antivirus software.