Article 4SVHM How to find the true amount of usable free hard drive space?

How to find the true amount of usable free hard drive space?

by
grumpyskeptic
from LinuxQuestions.org on (#4SVHM)
I am using Linux Mint 17.3 Rosa Cinnamon.

I would like to know the actual amount of usable space I have left on my hard disk, that I can use store files.

The file manager Nemo says I have 5.4gb.

Disk Usage Analyser says I have 30.3gb.

Something called "Disks" says I have exactly 30gb.

Question please:
What is the reliable console command that I can use to find the amount of usable hard drive space I have left?

I think my HD is nearly full, so only Nemo is likely to be correct. Before I removed some large files, I kept getting low disk space warnings.

Thanks.latest?d=yIl2AUoC8zA latest?i=ZWkkhGp1XhA:S_WH3207D4I:F7zBnMy latest?i=ZWkkhGp1XhA:S_WH3207D4I:V_sGLiP latest?d=qj6IDK7rITs latest?i=ZWkkhGp1XhA:S_WH3207D4I:gIN9vFwZWkkhGp1XhA
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