How do I find the amount of free space on my hard drive?
In Nautilus, I can easily see the physical size (total capacity, free space, used space) of any mounted disk, e.g. those mounted under /media, by right-clicking on them where they are listed on the top of the left panel (with a disk icon), or even by right-clicking on their folder icon on the right when I'm seeing the contents of folder that contains them (e.g. /media).
But I can't do that with the partition that contains the root filesystem. How can I see the physical properties of the disk partition that is used as the / filesystem??
It is shown in the left panel of Nautilus as "File System" with an icon similar (but not identical) to that of mounted filesystems, but if I right-click on it it will only show (after the time it takes to compute it) the total size of its contents including other mounted filesystems, and it won't show neither the total capacity nor the free space.