cdf means "colorized df". The main features of cdf are:
* customazable color schemes
* eye-friendly capacity bars

To use it, download cdf-0.2.tgz then pkg_add cdf-0.2.tgz,
and add the following alias to your .cshrc
alias df cdf -ht ffs
or to .profile
alias df='cdf -ht ffs'