Failed to set locale, defaulting to C

If you are encountering the error message “Failed to set locale, defaulting to C” in CentOS 7, it means that the system is unable to determine the appropriate locale settings. You can fix this error by following these steps:

  1. Open a terminal on your CentOS 7 system.

  2. Run the following command to open the locale configuration file:

    sudo vi /etc/environment
    
  3. In the file, add the following line to set the default locale:

    LC_ALL=en_US.UTF-8
    

    You can replace en_US.UTF-8 with the desired locale if needed.

  4. Save the file and exit the text editor.

  5. Run the following command to apply the changes:

    source /etc/environment
    

    This will load the updated environment variables.

  6. Log out of your CentOS 7 session and log back in for the changes to take effect.

After following these steps, the “Failed to set locale, defaulting to C” error should no longer appear, and the correct locale will be set on your CentOS 7 system.