Convert df command to posix; uber GREPable

df -P
It is a pain grep-ing/sed-ing/awk-ing plain old df. POSIX it!
Sample Output
$ df -P
Filesystem         1024-blocks      Used Available Capacity Mounted on
/dev/mapper/VolGroup00-LogVol00  37219896   7215776  29626424      20% /
/dev/sda1               194442     13553    170850       8% /boot tmpfs

3
2009-02-18 20:53:31
df

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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