CentOS 7 - Install Pydf
Pydf is an alternative to the df command that I find is much easier to quickly read and understand due to it's use of text-based graphs like below:
Filesystem Size Used Avail Use% Mounted on /dev/centos/root 13G 1332M 12G 10.0 [#........] / /dev/vda1 497M 150M 347M 30.1 [###......] /boot
Unfortunately it is not available for CentOS in the epel repositories, however you can install through pythons package management system.
sudo yum install -y python-pip sudo pip install --upgrade pip sudo /usr/local/bin/pip install pydf