Easily finding the disk usage and free space available within Ubuntu.
The File Systems option located from System Monitor provides information about the drives on a Ubuntu computer.
Open the apps, by clicking on the top icon on the Ubuntu menu at the left.
In the search box type as much of system monitor as you need until the relevant icon appears.
Click on the System Monitor icon.
Click on the third tab File Systems to show a list of drives, their usage and free space.
For my trial laptop, an old Panasonic CF-W2, the output is as per the image below:
