If you want a more human readable Disk Usage stats while using linux, add the following script to your .bashrc

alias duf='du -sk * | sort -n | perl -ne '\''($s,$f)=split(m{\t});for (qw(K M G)) {if($s<1024) {printf("%.1f",$s);print "$_\t$f"; last};$s=$s/1024}'\'

You should add it under User specified Functions and aliases. When you are done with it this is what you will see when you type duf in your terminal.