> >># df -kh
> >>Filesystem     Size    Used   Avail Capacity  Mounted on
> >>/dev/sd2a      906G    859G    1.2G   100%    /home

$ cd
$ sync ; sync ; sync ; df -h
$ dd if=/dev/zero of=file bs=1m count=1024
$ du -h file
$ sync ; sync ; sync ; df -h

        Did the Avail space drop by 1G?

$ rm -f file
$ sync ; sync ; sync ; df -h

        Did the Avail space rise by 1G again?

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