How to check disk usage in Terminal

Though I mainly use OS X, I am very found of using the Termnial for many tasks.

Amongst those task is to check disk usage and I am often ask how one does that, so here we go.

Command: 

The command for checking disk usages is: df Which simply gives you this:

Which is almost useless to people who are not nerdy enough.

df -h

By being at little crafty there is a flag, to the df and that is df -h, the -h gives you a human readable layout. 

This also works on Linux, BSD and Solaris.