@george1421 That will be overwritten the very next time he updates fog unless the blexports option in /opt/fog/.fogsetting is set to 0
You can edit this file with vi or nano and set that option to 0. This way the changes that George suggests will stick the next time you update fog.
Reference:
https://wiki.fogproject.org/wiki/index.php?title=.fogsettings#NFS