Using 'quota' for disk limits

I installed quota using apt-get and followed some of the tutorials online.

I ran sudo edquota username which opened nano and gave a chart for me to edit. What does the chart mean when it says soft, hard, etc.?

Is there a proper tutorial for quota on Ubuntu? What's the official website for quota?

Or is there another option for setting user disk limits?

Here is a quick and easy tutorial for setting up disk quotas. It also defines the differences of hard quota and soft quota. It also shows how to set a grace period.

It is generic and should work under any version of Ubuntu.

Hope this helps!

disk quota 5 steps