The File Extensions Database

.CNF File Extension

  • Developer by: MySQL
  • Category: Settings Files
  • Format: Text

What is an .CNF file?

.CNF is MySQL Configuration File

Configuration file used by MySQL, an open source relational database program; contains settings such as the default character encoding, timeouts, and cache and buffer settings; often modified to fine-tune performance depending on the use of the database.

The MySQL configuration file has the name my.cnf. It is most often located in the /etc/ directory. The file is saved in a plain text format.

Common CNF Filenames

my.cnf - The primary MySQL configuration file located in the /etc/ directory by default.

Programs that open MySQL Configuration File
File Type 2 Telnet Configuration File
Category: Settings Files

Stores information used to make a telnet connection, such as the server name, username, and password; serves as a shortcut for common telnet sessions.

How to solve problems with CNF files

  • Associate the CNF file extension with the correct application. On :
    Windows: Right click on any CNF file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.CNF files". Mac: Right click (or Ctrl-click) the CNF 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 .CNF is MySQL Configuration File. Because only the current version supports the latest CNF file format. Search, therefore, e.g. on the MySQL manufacturer website after an available .CNF is MySQL Configuration File update.
  • To make sure that your CNF file is not corrupted or virus-infected, get the file again and scan it with antivirus software.